51723775 has 18 divisors (see below), whose sum is σ = 68141720. Its totient is φ = 38939520.

The previous prime is 51723769. The next prime is 51723811. The reversal of 51723775 is 57732715.

It is not a de Polignac number, because 51723775 - 2¹³ = 51715583 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 3646 + ... + 10804.

Almost surely, 2^51723775 is an apocalyptic number.

51723775 is a deficient number, since it is larger than the sum of its proper divisors (16417945).

51723775 is a wasteful number, since it uses less digits than its factorization.

51723775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7203 (or 7181 counting only the distinct ones).

The product of its digits is 51450, while the sum is 37.

The square root of 51723775 is about 7191.9242904803. The cubic root of 51723775 is about 372.5890362665.

The spelling of 51723775 in words is "fifty-one million, seven hundred twenty-three thousand, seven hundred seventy-five".