252553431021 has 8 divisors (see below), whose sum is σ = 344951027904. Its totient is φ = 164262394080.

The previous prime is 252553430977. The next prime is 252553431047. The reversal of 252553431021 is 120134355252.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 252553431021 - 2⁶ = 252553430957 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (252553431821) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1026639841 + ... + 1026640086.

It is an arithmetic number, because the mean of its divisors is an integer number (43118878488).

Almost surely, 2^252553431021 is an apocalyptic number.

It is an amenable number.

252553431021 is a deficient number, since it is larger than the sum of its proper divisors (92397596883).

252553431021 is a wasteful number, since it uses less digits than its factorization.

252553431021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2053279971.

The product of its (nonzero) digits is 36000, while the sum is 33.

Adding to 252553431021 its reverse (120134355252), we get a palindrome (372687786273).

The spelling of 252553431021 in words is "two hundred fifty-two billion, five hundred fifty-three million, four hundred thirty-one thousand, twenty-one".