51887992 has 16 divisors (see below), whose sum is σ = 104774040. Its totient is φ = 23948256.

The previous prime is 51887987. The next prime is 51887999. The reversal of 51887992 is 29978815.

It is a nialpdrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51887999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 249358 + ... + 249565.

Almost surely, 2^51887992 is an apocalyptic number.

51887992 is a gapful number since it is divisible by the number (52) formed by its first and last digit.

It is an amenable number.

51887992 is an abundant number, since it is smaller than the sum of its proper divisors (52886048).

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

51887992 is a wasteful number, since it uses less digits than its factorization.

51887992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 498942 (or 498938 counting only the distinct ones).

The product of its digits is 362880, while the sum is 49.

The square root of 51887992 is about 7203.3320067869. The cubic root of 51887992 is about 372.9829287302.

The spelling of 51887992 in words is "fifty-one million, eight hundred eighty-seven thousand, nine hundred ninety-two".