252521142402 has 16 divisors (see below), whose sum is σ = 507686487552. Its totient is φ = 83733013680.

The previous prime is 252521142359. The next prime is 252521142427. The reversal of 252521142402 is 204241125252.

It is a super-2 number, since 2×252521142402² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 252521142402.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 110173873 + ... + 110176164.

It is an arithmetic number, because the mean of its divisors is an integer number (31730405472).

Almost surely, 2^252521142402 is an apocalyptic number.

252521142402 is an abundant number, since it is smaller than the sum of its proper divisors (255165345150).

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

252521142402 is a wasteful number, since it uses less digits than its factorization.

252521142402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220350233.

The product of its (nonzero) digits is 12800, while the sum is 30.

Adding to 252521142402 its reverse (204241125252), we get a palindrome (456762267654).

The spelling of 252521142402 in words is "two hundred fifty-two billion, five hundred twenty-one million, one hundred forty-two thousand, four hundred two".