252169013700 has 90 divisors (see below), whose sum is σ = 817432346346. Its totient is φ = 67245068160.

The previous prime is 252169013687. The next prime is 252169013729. The reversal of 252169013700 is 7310961252.

252169013700 is a `hidden beast` number, since 2 + 521 + 69 + 0 + 1 + 3 + 70 + 0 = 666.

It can be written as a sum of positive squares in 3 ways, for example, as 199148544 + 251969865156 = 14112^2 + 501966^2 .

It is a tau number, because it is divible by the number of its divisors (90).

It is a super-2 number, since 2×252169013700² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 15557889 + ... + 15574088.

Almost surely, 2^252169013700 is an apocalyptic number.

252169013700 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

252169013700 is an abundant number, since it is smaller than the sum of its proper divisors (565263332646).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

252169013700 is a wasteful number, since it uses less digits than its factorization.

252169013700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31132003 (or 31131987 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 36.

Adding to 252169013700 its reverse (7310961252), we get a palindrome (259479974952).

The spelling of 252169013700 in words is "two hundred fifty-two billion, one hundred sixty-nine million, thirteen thousand, seven hundred".