213505225 has 12 divisors (see below), whose sum is σ = 265000896. Its totient is φ = 170640080.

The previous prime is 213505219. The next prime is 213505231. The reversal of 213505225 is 522505312.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (213505219) and next prime (213505231).

It is not a de Polignac number, because 213505225 - 2²³ = 205116617 is a prime.

It is a super-2 number, since 2×213505225² = 91168962204601250, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 213505225.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 27084 + ... + 34066.

It is an arithmetic number, because the mean of its divisors is an integer number (22083408).

Almost surely, 2^213505225 is an apocalyptic number.

213505225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

213505225 is a deficient number, since it is larger than the sum of its proper divisors (51495671).

213505225 is a wasteful number, since it uses less digits than its factorization.

213505225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8216 (or 8211 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 25.

The square root of 213505225 is about 14611.8179909278. The cubic root of 213505225 is about 597.6810723183.

The spelling of 213505225 in words is "two hundred thirteen million, five hundred five thousand, two hundred twenty-five".