51388892 has 12 divisors (see below), whose sum is σ = 95220720. Its totient is φ = 24182976.

The previous prime is 51388891. The next prime is 51388903. The reversal of 51388892 is 29888315.

It is a hoax number, since the sum of its digits (44) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51388891) 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, 377792 + ... + 377927.

It is an arithmetic number, because the mean of its divisors is an integer number (7935060).

Almost surely, 2^51388892 is an apocalyptic number.

It is an amenable number.

51388892 is a deficient number, since it is larger than the sum of its proper divisors (43831828).

51388892 is a wasteful number, since it uses less digits than its factorization.

51388892 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 755740 (or 755738 counting only the distinct ones).

The product of its digits is 138240, while the sum is 44.

The square root of 51388892 is about 7168.6046061978. The cubic root of 51388892 is about 371.7831915819.

The spelling of 51388892 in words is "fifty-one million, three hundred eighty-eight thousand, eight hundred ninety-two".