51408136 has 32 divisors (see below), whose sum is σ = 109914840. Its totient is φ = 22330368.

The previous prime is 51408127. The next prime is 51408139. The reversal of 51408136 is 63180415.

It can be written as a sum of positive squares in 4 ways, for example, as 47527236 + 3880900 = 6894^2 + 1970^2 .

It is not an unprimeable number, because it can be changed into a prime (51408139) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12771 + ... + 16306.

Almost surely, 2^51408136 is an apocalyptic number.

It is an amenable number.

51408136 is an abundant number, since it is smaller than the sum of its proper divisors (58506704).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51408136 is a wasteful number, since it uses less digits than its factorization.

51408136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29113 (or 29109 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 51408136 is about 7169.9467222567. The cubic root of 51408136 is about 371.8295939759.

The spelling of 51408136 in words is "fifty-one million, four hundred eight thousand, one hundred thirty-six".