15597223937 has 12 divisors (see below), whose sum is σ = 17440719120. Its totient is φ = 13907117376.

The previous prime is 15597223921. The next prime is 15597223973. The reversal of 15597223937 is 73932279551.

It is not a de Polignac number, because 15597223937 - 2⁴ = 15597223921 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15597223907) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1414763 + ... + 1425744.

It is an arithmetic number, because the mean of its divisors is an integer number (1453393260).

Almost surely, 2^15597223937 is an apocalyptic number.

15597223937 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

15597223937 is a deficient number, since it is larger than the sum of its proper divisors (1843495183).

15597223937 is a wasteful number, since it uses less digits than its factorization.

15597223937 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2840560 (or 2840543 counting only the distinct ones).

The product of its digits is 3572100, while the sum is 53.

The spelling of 15597223937 in words is "fifteen billion, five hundred ninety-seven million, two hundred twenty-three thousand, nine hundred thirty-seven".