15315620251 has 6 divisors (see below), whose sum is σ = 15610049420. Its totient is φ = 15026643528.

The previous prime is 15315620239. The next prime is 15315620261. The reversal of 15315620251 is 15202651351.

15315620251 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 15315620251 - 2¹⁹ = 15315095963 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15315620261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2723361 + ... + 2728978.

Almost surely, 2^15315620251 is an apocalyptic number.

15315620251 is a deficient number, since it is larger than the sum of its proper divisors (294429169).

15315620251 is an frugal number, since it uses more digits than its factorization.

15315620251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5452445 (or 5452392 counting only the distinct ones).

The product of its (nonzero) digits is 9000, while the sum is 31.

The spelling of 15315620251 in words is "fifteen billion, three hundred fifteen million, six hundred twenty thousand, two hundred fifty-one".