51523567 has 4 divisors (see below), whose sum is σ = 51546456. Its totient is φ = 51500680.

The previous prime is 51523553. The next prime is 51523621. The reversal of 51523567 is 76532515.

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

It is a cyclic number.

It is not a de Polignac number, because 51523567 - 2¹⁵ = 51490799 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51523267) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7648 + ... + 12709.

It is an arithmetic number, because the mean of its divisors is an integer number (12886614).

Almost surely, 2^51523567 is an apocalyptic number.

51523567 is a deficient number, since it is larger than the sum of its proper divisors (22889).

51523567 is a wasteful number, since it uses less digits than its factorization.

51523567 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22888.

The product of its digits is 31500, while the sum is 34.

The square root of 51523567 is about 7177.9918500929. The cubic root of 51523567 is about 372.1076859977.

The spelling of 51523567 in words is "fifty-one million, five hundred twenty-three thousand, five hundred sixty-seven".