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214710409 = 146532
BaseRepresentation
bin11001100110000…
…11100010001001
3112222000102022101
430303003202021
5414431213114
633145553401
75215002604
oct1463034211
9488012271
10214710409
11100220121
125baa5861
1335637ba4
142073133b
1513cb2d74
hexccc3889

214710409 has 3 divisors (see below), whose sum is σ = 214725063. Its totient is φ = 214695756.

The previous prime is 214710407. The next prime is 214710427. The reversal of 214710409 is 904017412.

The square root of 214710409 is 14653.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 174108025 + 40602384 = 13195^2 + 6372^2 .

It is not a de Polignac number, because 214710409 - 21 = 214710407 is a prime.

It is a super-2 number, since 2×2147104092 = 92201119465894562, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (214710407) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 7327 + ... + 21979.

It is an arithmetic number, because the mean of its divisors is an integer number (71575021).

Almost surely, 2214710409 is an apocalyptic number.

214710409 is the 14653-rd square number.

214710409 is the 7327-th centered octagonal number.

It is an amenable number.

214710409 is a deficient number, since it is larger than the sum of its proper divisors (14654).

214710409 is an frugal number, since it uses more digits than its factorization.

214710409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29306 (or 14653 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 28.

The cubic root of 214710409 is about 598.8035500242.

The spelling of 214710409 in words is "two hundred fourteen million, seven hundred ten thousand, four hundred nine".

Divisors: 1 14653 214710409