15131052440 has 64 divisors (see below), whose sum is σ = 39546308160. Its totient is φ = 5102737920.

The previous prime is 15131052437. The next prime is 15131052449. The reversal of 15131052440 is 4425013151.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15131052449) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 425867 + ... + 460026.

It is an arithmetic number, because the mean of its divisors is an integer number (617911065).

Almost surely, 2^15131052440 is an apocalyptic number.

15131052440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15131052440 is an abundant number, since it is smaller than the sum of its proper divisors (24415255720).

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

15131052440 is a wasteful number, since it uses less digits than its factorization.

15131052440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 885972 (or 885968 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 26.

Adding to 15131052440 its reverse (4425013151), we get a palindrome (19556065591).

The spelling of 15131052440 in words is "fifteen billion, one hundred thirty-one million, fifty-two thousand, four hundred forty".