253252531021 has 16 divisors (see below), whose sum is σ = 291233683840. Its totient is φ = 215725446720.

The previous prime is 253252530989. The next prime is 253252531109. The reversal of 253252531021 is 120135252352.

It is not a de Polignac number, because 253252531021 - 2⁵ = 253252530989 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (253252591021) 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 15 ways as a sum of consecutive naturals, for example, 721210 + ... + 1013236.

It is an arithmetic number, because the mean of its divisors is an integer number (18202105240).

Almost surely, 2^253252531021 is an apocalyptic number.

It is an amenable number.

253252531021 is a deficient number, since it is larger than the sum of its proper divisors (37981152819).

253252531021 is a wasteful number, since it uses less digits than its factorization.

253252531021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 292804.

The product of its (nonzero) digits is 18000, while the sum is 31.

Adding to 253252531021 its reverse (120135252352), we get a palindrome (373387783373).

The spelling of 253252531021 in words is "two hundred fifty-three billion, two hundred fifty-two million, five hundred thirty-one thousand, twenty-one".