51608331 has 12 divisors (see below), whose sum is σ = 74656608. Its totient is φ = 34354224.

The previous prime is 51608329. The next prime is 51608353. The reversal of 51608331 is 13380615.

51608331 is a `hidden beast` number, since 51 + 608 + 3 + 3 + 1 = 666.

It is not a de Polignac number, because 51608331 - 2¹ = 51608329 is a prime.

It is a super-2 number, since 2×51608331² = 5326839657211122, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 51608295 and 51608304.

It is not an unprimeable number, because it can be changed into a prime (51608131) 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, 2686 + ... + 10508.

It is an arithmetic number, because the mean of its divisors is an integer number (6221384).

Almost surely, 2^51608331 is an apocalyptic number.

51608331 is a deficient number, since it is larger than the sum of its proper divisors (23048277).

51608331 is a wasteful number, since it uses less digits than its factorization.

51608331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8562 (or 8559 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 51608331 is about 7183.8938605745. The cubic root of 51608331 is about 372.3116318603.

Adding to 51608331 its reverse (13380615), we get a palindrome (64988946).

The spelling of 51608331 in words is "fifty-one million, six hundred eight thousand, three hundred thirty-one".