15238209725 has 24 divisors (see below), whose sum is σ = 19117669248. Its totient is φ = 12047705600.

The previous prime is 15238209713. The next prime is 15238209733. The reversal of 15238209725 is 52790283251.

It is a de Polignac number, because none of the positive numbers 2^k-15238209725 is a prime.

It is a Duffinian number.

It is a congruent number.

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, 1146317 + ... + 1159533.

It is an arithmetic number, because the mean of its divisors is an integer number (796569552).

Almost surely, 2^15238209725 is an apocalyptic number.

It is an amenable number.

15238209725 is a deficient number, since it is larger than the sum of its proper divisors (3879459523).

15238209725 is a wasteful number, since it uses less digits than its factorization.

15238209725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13765 (or 13760 counting only the distinct ones).

The product of its (nonzero) digits is 302400, while the sum is 44.

The spelling of 15238209725 in words is "fifteen billion, two hundred thirty-eight million, two hundred nine thousand, seven hundred twenty-five".