51387892 has 12 divisors (see below), whose sum is σ = 89980576. Its totient is φ = 25679160.

The previous prime is 51387887. The next prime is 51387893. The reversal of 51387892 is 29878315.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51387893) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8863 + ... + 13465.

Almost surely, 2^51387892 is an apocalyptic number.

It is an amenable number.

51387892 is a deficient number, since it is larger than the sum of its proper divisors (38592684).

51387892 is a wasteful number, since it uses less digits than its factorization.

51387892 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7398 (or 7396 counting only the distinct ones).

The product of its digits is 120960, while the sum is 43.

The square root of 51387892 is about 7168.5348572773. The cubic root of 51387892 is about 371.7807799998.

The spelling of 51387892 in words is "fifty-one million, three hundred eighty-seven thousand, eight hundred ninety-two".