51603992 has 64 divisors (see below), whose sum is σ = 111088800. Its totient is φ = 22256640.

The previous prime is 51603991. The next prime is 51604001. The reversal of 51603992 is 29930615.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51603991) 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 15 ways as a sum of consecutive naturals, for example, 186158 + ... + 186434.

Almost surely, 2^51603992 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51603992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (55544400).

51603992 is an abundant number, since it is smaller than the sum of its proper divisors (59484808).

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

51603992 is a wasteful number, since it uses less digits than its factorization.

51603992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 396 (or 392 counting only the distinct ones).

The product of its (nonzero) digits is 14580, while the sum is 35.

The square root of 51603992 is about 7183.5918592303. The cubic root of 51603992 is about 372.3011974632.

The spelling of 51603992 in words is "fifty-one million, six hundred three thousand, nine hundred ninety-two".