23131157500 has 120 divisors (see below), whose sum is σ = 57582467712. Its totient is φ = 8045400000.

The previous prime is 23131157473. The next prime is 23131157557. The reversal of 23131157500 is 575113132.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 614215 + ... + 650785.

Almost surely, 2^23131157500 is an apocalyptic number.

23131157500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 23131157500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28791233856).

23131157500 is an abundant number, since it is smaller than the sum of its proper divisors (34451310212).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

23131157500 is a wasteful number, since it uses less digits than its factorization.

23131157500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36629 (or 36612 counting only the distinct ones).

The product of its (nonzero) digits is 3150, while the sum is 28.

The spelling of 23131157500 in words is "twenty-three billion, one hundred thirty-one million, one hundred fifty-seven thousand, five hundred".