23131898 has 4 divisors (see below), whose sum is σ = 34697850. Its totient is φ = 11565948.

The previous prime is 23131897. The next prime is 23131931. The reversal of 23131898 is 89813132.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 23107249 + 24649 = 4807^2 + 157^2 .

It is not an unprimeable number, because it can be changed into a prime (23131897) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5782973 + ... + 5782976.

Almost surely, 2^23131898 is an apocalyptic number.

23131898 is a deficient number, since it is larger than the sum of its proper divisors (11565952).

23131898 is a wasteful number, since it uses less digits than its factorization.

23131898 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11565951.

The product of its digits is 10368, while the sum is 35.

The square root of 23131898 is about 4809.5631818285. The cubic root of 23131898 is about 284.9292858313.

The spelling of 23131898 in words is "twenty-three million, one hundred thirty-one thousand, eight hundred ninety-eight".