23131432 has 8 divisors (see below), whose sum is σ = 43371450. Its totient is φ = 11565712.

The previous prime is 23131429. The next prime is 23131453. The reversal of 23131432 is 23413132.

It can be written as a sum of positive squares in only one way, i.e., 22982436 + 148996 = 4794^2 + 386^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 1445707 + ... + 1445722.

Almost surely, 2^23131432 is an apocalyptic number.

It is an amenable number.

23131432 is a deficient number, since it is larger than the sum of its proper divisors (20240018).

23131432 is a wasteful number, since it uses less digits than its factorization.

23131432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2891435 (or 2891431 counting only the distinct ones).

The product of its digits is 432, while the sum is 19.

The square root of 23131432 is about 4809.5147364365. The cubic root of 23131432 is about 284.9273724858.

Adding to 23131432 its reverse (23413132), we get a palindrome (46544564).

The spelling of 23131432 in words is "twenty-three million, one hundred thirty-one thousand, four hundred thirty-two".