51523747 has 4 divisors (see below), whose sum is σ = 56207736. Its totient is φ = 46839760.

The previous prime is 51523727. The next prime is 51523783. The reversal of 51523747 is 74732515.

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

It is not a de Polignac number, because 51523747 - 2²³ = 43135139 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51523727) 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, 2341978 + ... + 2341999.

It is an arithmetic number, because the mean of its divisors is an integer number (14051934).

Almost surely, 2^51523747 is an apocalyptic number.

51523747 is a deficient number, since it is larger than the sum of its proper divisors (4683989).

51523747 is a wasteful number, since it uses less digits than its factorization.

51523747 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4683988.

The product of its digits is 29400, while the sum is 34.

The square root of 51523747 is about 7178.0043884077. The cubic root of 51523747 is about 372.1081193224.

The spelling of 51523747 in words is "fifty-one million, five hundred twenty-three thousand, seven hundred forty-seven".