15251253220 has 24 divisors (see below), whose sum is σ = 36603008064. Its totient is φ = 5229001056.

The previous prime is 15251253181. The next prime is 15251253257. The reversal of 15251253220 is 2235215251.

It is a Harshad number since it is a multiple of its sum of digits (28).

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, 54468622 + ... + 54468901.

It is an arithmetic number, because the mean of its divisors is an integer number (1525125336).

Almost surely, 2^15251253220 is an apocalyptic number.

15251253220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15251253220 is an abundant number, since it is smaller than the sum of its proper divisors (21351754844).

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

15251253220 is a wasteful number, since it uses less digits than its factorization.

15251253220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108937539 (or 108937537 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 28.

Adding to 15251253220 its reverse (2235215251), we get a palindrome (17486468471).

The spelling of 15251253220 in words is "fifteen billion, two hundred fifty-one million, two hundred fifty-three thousand, two hundred twenty".