23532551 has 4 divisors (see below), whose sum is σ = 26894352. Its totient is φ = 20170752.

The previous prime is 23532547. The next prime is 23532557. The reversal of 23532551 is 15523532.

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

It is not a de Polignac number, because 23532551 - 2² = 23532547 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 23532551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23532557) 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 3 ways as a sum of consecutive naturals, for example, 1680890 + ... + 1680903.

It is an arithmetic number, because the mean of its divisors is an integer number (6723588).

Almost surely, 2^23532551 is an apocalyptic number.

23532551 is a deficient number, since it is larger than the sum of its proper divisors (3361801).

23532551 is an equidigital number, since it uses as much as digits as its factorization.

23532551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3361800.

The product of its digits is 4500, while the sum is 26.

The square root of 23532551 is about 4851.0360749019. The cubic root of 23532551 is about 286.5649054410.

The spelling of 23532551 in words is "twenty-three million, five hundred thirty-two thousand, five hundred fifty-one".