15251511225 has 24 divisors (see below), whose sum is σ = 25229527072. Its totient is φ = 8129721600.

The previous prime is 15251511193. The next prime is 15251511241. The reversal of 15251511225 is 52211515251.

It is not a de Polignac number, because 15251511225 - 2⁵ = 15251511193 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 15251511192 and 15251511201.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 86190 + ... + 194760.

Almost surely, 2^15251511225 is an apocalyptic number.

15251511225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

15251511225 is a deficient number, since it is larger than the sum of its proper divisors (9978015847).

15251511225 is a wasteful number, since it uses less digits than its factorization.

15251511225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110457 (or 110452 counting only the distinct ones).

The product of its digits is 5000, while the sum is 30.

The spelling of 15251511225 in words is "fifteen billion, two hundred fifty-one million, five hundred eleven thousand, two hundred twenty-five".