23132551 has 6 divisors (see below), whose sum is σ = 25049040. Its totient is φ = 21352968.

The previous prime is 23132521. The next prime is 23132561. The reversal of 23132551 is 15523132.

It is not a de Polignac number, because 23132551 - 2⁷ = 23132423 is a prime.

It is a super-2 number, since 2×23132551² = 1070229831535202, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23132521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 68271 + ... + 68608.

It is an arithmetic number, because the mean of its divisors is an integer number (4174840).

Almost surely, 2^23132551 is an apocalyptic number.

23132551 is a deficient number, since it is larger than the sum of its proper divisors (1916489).

23132551 is a wasteful number, since it uses less digits than its factorization.

23132551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136905 (or 136892 counting only the distinct ones).

The product of its digits is 900, while the sum is 22.

The square root of 23132551 is about 4809.6310669323. The cubic root of 23132551 is about 284.9319669353.

Adding to 23132551 its reverse (15523132), we get a palindrome (38655683).

The spelling of 23132551 in words is "twenty-three million, one hundred thirty-two thousand, five hundred fifty-one".