51723285 has 16 divisors (see below), whose sum is σ = 82892160. Its totient is φ = 27540800.

The previous prime is 51723277. The next prime is 51723293. The reversal of 51723285 is 58232715.

It is an interprime number because it is at equal distance from previous prime (51723277) and next prime (51723293).

It is not a de Polignac number, because 51723285 - 2³ = 51723277 is a prime.

It is a super-2 number, since 2×51723285² = 5350596422382450, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8056 + ... + 12974.

It is an arithmetic number, because the mean of its divisors is an integer number (5180760).

Almost surely, 2^51723285 is an apocalyptic number.

It is an amenable number.

51723285 is a deficient number, since it is larger than the sum of its proper divisors (31168875).

51723285 is a wasteful number, since it uses less digits than its factorization.

51723285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5628.

The product of its digits is 16800, while the sum is 33.

The square root of 51723285 is about 7191.8902244125. The cubic root of 51723285 is about 372.5878597012.

The spelling of 51723285 in words is "fifty-one million, seven hundred twenty-three thousand, two hundred eighty-five".