15225500420 has 24 divisors (see below), whose sum is σ = 34433055384. Its totient is φ = 5621723136.

The previous prime is 15225500393. The next prime is 15225500467. The reversal of 15225500420 is 2400552251.

It can be written as a sum of positive squares in 4 ways, for example, as 3150127876 + 12075372544 = 56126^2 + 109888^2 .

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a self number, because there is not a number n which added to its sum of digits gives 15225500420.

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, 29279549 + ... + 29280068.

It is an arithmetic number, because the mean of its divisors is an integer number (1434710641).

Almost surely, 2^15225500420 is an apocalyptic number.

15225500420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15225500420 is an abundant number, since it is smaller than the sum of its proper divisors (19207554964).

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

15225500420 is a wasteful number, since it uses less digits than its factorization.

15225500420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58559639 (or 58559637 counting only the distinct ones).

The product of its (nonzero) digits is 4000, while the sum is 26.

The spelling of 15225500420 in words is "fifteen billion, two hundred twenty-five million, five hundred thousand, four hundred twenty".