51817392 has 60 divisors (see below), whose sum is σ = 158204904. Its totient is φ = 15701760.

The previous prime is 51817391. The next prime is 51817421. The reversal of 51817392 is 29371815.

51817392 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×51817392² = 5370084227363328, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (51817391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14773 + ... + 17940.

Almost surely, 2^51817392 is an apocalyptic number.

It is an amenable number.

51817392 is an abundant number, since it is smaller than the sum of its proper divisors (106387512).

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

51817392 is a wasteful number, since it uses less digits than its factorization.

51817392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32738 (or 32729 counting only the distinct ones).

The product of its digits is 15120, while the sum is 36.

The square root of 51817392 is about 7198.4298287891. The cubic root of 51817392 is about 372.8136888881.

The spelling of 51817392 in words is "fifty-one million, eight hundred seventeen thousand, three hundred ninety-two".