51994831 has 24 divisors (see below), whose sum is σ = 62643456. Its totient is φ = 43006320.

The previous prime is 51994829. The next prime is 51994841. The reversal of 51994831 is 13849915.

51994831 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 51994831 - 2¹ = 51994829 is a prime.

It is a super-2 number, since 2×51994831² = 5406924901437122, 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 (51994841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 246316 + ... + 246526.

It is an arithmetic number, because the mean of its divisors is an integer number (2610144).

Almost surely, 2^51994831 is an apocalyptic number.

51994831 is a deficient number, since it is larger than the sum of its proper divisors (10648625).

51994831 is a wasteful number, since it uses less digits than its factorization.

51994831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 379 (or 372 counting only the distinct ones).

The product of its digits is 38880, while the sum is 40.

The square root of 51994831 is about 7210.7441363565. The cubic root of 51994831 is about 373.2387477397.

It can be divided in two parts, 51994 and 831, that added together give a palindrome (52825).

The spelling of 51994831 in words is "fifty-one million, nine hundred ninety-four thousand, eight hundred thirty-one".