[go: up one dir, main page]

Search a number
-
+
21350871 = 34263591
BaseRepresentation
bin101000101110…
…0100111010111
31111011201220000
41101130213113
520431211441
62041342343
7346323303
oct121344727
944151800
1021350871
1111063253
1271979b3
134567269
142b9ad03
151d1b2b6
hex145c9d7

21350871 has 10 divisors (see below), whose sum is σ = 31894632. Its totient is φ = 14233860.

The previous prime is 21350869. The next prime is 21350897. The reversal of 21350871 is 17805312.

It is not a de Polignac number, because 21350871 - 21 = 21350869 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21350071) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 131715 + ... + 131876.

Almost surely, 221350871 is an apocalyptic number.

21350871 is a deficient number, since it is larger than the sum of its proper divisors (10543761).

21350871 is an equidigital number, since it uses as much as digits as its factorization.

21350871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 263603 (or 263594 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 27.

The square root of 21350871 is about 4620.7002716039. The cubic root of 21350871 is about 277.4204885421.

The spelling of 21350871 in words is "twenty-one million, three hundred fifty thousand, eight hundred seventy-one".

Divisors: 1 3 9 27 81 263591 790773 2372319 7116957 21350871