15251235242 has 8 divisors (see below), whose sum is σ = 22926912996. Its totient is φ = 7608930912.

The previous prime is 15251235221. The next prime is 15251235281. The reversal of 15251235242 is 24253215251.

It can be written as a sum of positive squares in 2 ways, for example, as 11231548441 + 4019686801 = 105979^2 + 63401^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 15251235199 and 15251235208.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8342213 + ... + 8344040.

Almost surely, 2^15251235242 is an apocalyptic number.

15251235242 is a deficient number, since it is larger than the sum of its proper divisors (7675677754).

15251235242 is a wasteful number, since it uses less digits than its factorization.

15251235242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16686712.

The product of its digits is 24000, while the sum is 32.

The spelling of 15251235242 in words is "fifteen billion, two hundred fifty-one million, two hundred thirty-five thousand, two hundred forty-two".