252020311540 has 24 divisors (see below), whose sum is σ = 529761054312. Its totient is φ = 100709381760.

The previous prime is 252020311513. The next prime is 252020311637. The reversal of 252020311540 is 45113020252.

It can be written as a sum of positive squares in 4 ways, for example, as 10188479844 + 241831831696 = 100938^2 + 491764^2 .

It is a congruent number.

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, 6150499 + ... + 6191338.

It is an arithmetic number, because the mean of its divisors is an integer number (22073377263).

Almost surely, 2^252020311540 is an apocalyptic number.

252020311540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

252020311540 is an abundant number, since it is smaller than the sum of its proper divisors (277740742772).

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

252020311540 is a wasteful number, since it uses less digits than its factorization.

252020311540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12342867 (or 12342865 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 25.

Adding to 252020311540 its reverse (45113020252), we get a palindrome (297133331792).

The spelling of 252020311540 in words is "two hundred fifty-two billion, twenty million, three hundred eleven thousand, five hundred forty".