23131398 has 16 divisors (see below), whose sum is σ = 48697920. Its totient is φ = 7304616.

The previous prime is 23131393. The next prime is 23131429. The reversal of 23131398 is 89313132.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23131391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 101340 + ... + 101567.

It is an arithmetic number, because the mean of its divisors is an integer number (3043620).

Almost surely, 2^23131398 is an apocalyptic number.

23131398 is an abundant number, since it is smaller than the sum of its proper divisors (25566522).

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

23131398 is a wasteful number, since it uses less digits than its factorization.

23131398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202931.

The product of its digits is 3888, while the sum is 30.

The square root of 23131398 is about 4809.5112017751. The cubic root of 23131398 is about 284.9272328844.

The spelling of 23131398 in words is "twenty-three million, one hundred thirty-one thousand, three hundred ninety-eight".