252511221475542 has 16 divisors (see below), whose sum is σ = 506885994404352. Its totient is φ = 83859815249640.

The previous prime is 252511221475537. The next prime is 252511221475549. The reversal of 252511221475542 is 245574122115252.

It is a junction number, because it is equal to n+sod(n) for n = 252511221475491 and 252511221475500.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (252511221475549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 77647975458 + ... + 77647978709.

It is an arithmetic number, because the mean of its divisors is an integer number (31680374650272).

Almost surely, 2^{252511221475542} is an apocalyptic number.

252511221475542 is an abundant number, since it is smaller than the sum of its proper divisors (254374772928810).

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

252511221475542 is a wasteful number, since it uses less digits than its factorization.

252511221475542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155295954443.

The product of its digits is 2240000, while the sum is 48.

The spelling of 252511221475542 in words is "two hundred fifty-two trillion, five hundred eleven billion, two hundred twenty-one million, four hundred seventy-five thousand, five hundred forty-two".