51988356 has 36 divisors (see below), whose sum is σ = 150189312. Its totient is φ = 14853744.

The previous prime is 51988331. The next prime is 51988357. The reversal of 51988356 is 65388915.

51988356 is a `hidden beast` number, since 519 + 8 + 83 + 56 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is not an unprimeable number, because it can be changed into a prime (51988357) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 102900 + ... + 103403.

Almost surely, 2^51988356 is an apocalyptic number.

It is an amenable number.

51988356 is an abundant number, since it is smaller than the sum of its proper divisors (98200956).

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

51988356 is a wasteful number, since it uses less digits than its factorization.

51988356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206320 (or 206315 counting only the distinct ones).

The product of its digits is 259200, while the sum is 45.

The square root of 51988356 is about 7210.2951395903. The cubic root of 51988356 is about 373.2232537559.

The spelling of 51988356 in words is "fifty-one million, nine hundred eighty-eight thousand, three hundred fifty-six".