51600431 has 4 divisors (see below), whose sum is σ = 53843952. Its totient is φ = 49356912.

The previous prime is 51600401. The next prime is 51600467. The reversal of 51600431 is 13400615.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13400615 = 5 ⋅2680123.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51600431 is a prime.

It is a super-2 number, since 2×51600431² = 5325208958771522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51600401) 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, 1121726 + ... + 1121771.

It is an arithmetic number, because the mean of its divisors is an integer number (13460988).

Almost surely, 2^51600431 is an apocalyptic number.

51600431 is a deficient number, since it is larger than the sum of its proper divisors (2243521).

51600431 is a wasteful number, since it uses less digits than its factorization.

51600431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2243520.

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 51600431 is about 7183.3439984453. The cubic root of 51600431 is about 372.2926335582.

The spelling of 51600431 in words is "fifty-one million, six hundred thousand, four hundred thirty-one".