15251235240 has 32 divisors (see below), whose sum is σ = 45753706080. Its totient is φ = 4066996032.

The previous prime is 15251235221. The next prime is 15251235281. The reversal of 15251235240 is 4253215251.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 15251235198 and 15251235207.

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, 63546694 + ... + 63546933.

It is an arithmetic number, because the mean of its divisors is an integer number (1429803315).

Almost surely, 2^15251235240 is an apocalyptic number.

15251235240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15251235240 is an abundant number, since it is smaller than the sum of its proper divisors (30502470840).

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

15251235240 is a wasteful number, since it uses less digits than its factorization.

15251235240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127093641 (or 127093637 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 30.

The spelling of 15251235240 in words is "fifteen billion, two hundred fifty-one million, two hundred thirty-five thousand, two hundred forty".