23131455 has 16 divisors (see below), whose sum is σ = 38958720. Its totient is φ = 11687328.

The previous prime is 23131453. The next prime is 23131457. The reversal of 23131455 is 55413132.

It is an interprime number because it is at equal distance from previous prime (23131453) and next prime (23131457).

It is not a de Polignac number, because 23131455 - 2¹ = 23131453 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23131453) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40297 + ... + 40866.

It is an arithmetic number, because the mean of its divisors is an integer number (2434920).

Almost surely, 2^23131455 is an apocalyptic number.

23131455 is a deficient number, since it is larger than the sum of its proper divisors (15827265).

23131455 is a wasteful number, since it uses less digits than its factorization.

23131455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81190.

The product of its digits is 1800, while the sum is 24.

The square root of 23131455 is about 4809.5171275295. The cubic root of 23131455 is about 284.9274669219.

Adding to 23131455 its reverse (55413132), we get a palindrome (78544587).

The spelling of 23131455 in words is "twenty-three million, one hundred thirty-one thousand, four hundred fifty-five".