51901331 has 12 divisors (see below), whose sum is σ = 55321200. Its totient is φ = 48681648.

The previous prime is 51901309. The next prime is 51901361. The reversal of 51901331 is 13310915.

It is not a de Polignac number, because 51901331 - 2¹⁸ = 51639187 is a prime.

It is a super-2 number, since 2×51901331² = 5387496319143122, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51901297 and 51901306.

It is not an unprimeable number, because it can be changed into a prime (51901361) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 38690 + ... + 40008.

It is an arithmetic number, because the mean of its divisors is an integer number (4610100).

Almost surely, 2^51901331 is an apocalyptic number.

51901331 is a deficient number, since it is larger than the sum of its proper divisors (3419869).

51901331 is a wasteful number, since it uses less digits than its factorization.

51901331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1466 (or 1447 counting only the distinct ones).

The product of its (nonzero) digits is 405, while the sum is 23.

The square root of 51901331 is about 7204.2578382509. The cubic root of 51901331 is about 373.0148872677.

The spelling of 51901331 in words is "fifty-one million, nine hundred one thousand, three hundred thirty-one".