51631437 has 32 divisors (see below), whose sum is σ = 82244736. Its totient is φ = 28396800.

The previous prime is 51631357. The next prime is 51631457. The reversal of 51631437 is 73413615.

It is not a de Polignac number, because 51631437 - 2¹⁵ = 51598669 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51631457) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 25183 + ... + 27155.

It is an arithmetic number, because the mean of its divisors is an integer number (2570148).

Almost surely, 2^51631437 is an apocalyptic number.

It is an amenable number.

51631437 is a deficient number, since it is larger than the sum of its proper divisors (30613299).

51631437 is a wasteful number, since it uses less digits than its factorization.

51631437 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2061.

The product of its digits is 7560, while the sum is 30.

The square root of 51631437 is about 7185.5018613873. The cubic root of 51631437 is about 372.3671871609.

The spelling of 51631437 in words is "fifty-one million, six hundred thirty-one thousand, four hundred thirty-seven".