51132918 has 16 divisors (see below), whose sum is σ = 102859056. Its totient is φ = 16945440.

The previous prime is 51132911. The next prime is 51132929. The reversal of 51132918 is 81923115.

It is a super-2 number, since 2×51132918² = 5229150606389448, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51132911) 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, 23593 + ... + 25668.

It is an arithmetic number, because the mean of its divisors is an integer number (6428691).

Almost surely, 2^51132918 is an apocalyptic number.

51132918 is an abundant number, since it is smaller than the sum of its proper divisors (51726138).

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

51132918 is a wasteful number, since it uses less digits than its factorization.

51132918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49439.

The product of its digits is 2160, while the sum is 30.

The square root of 51132918 is about 7150.7284943564. The cubic root of 51132918 is about 371.1648654676.

The spelling of 51132918 in words is "fifty-one million, one hundred thirty-two thousand, nine hundred eighteen".