51537996 has 36 divisors (see below), whose sum is σ = 134481984. Its totient is φ = 16624800.

The previous prime is 51537973. The next prime is 51538001. The reversal of 51537996 is 69973515.

It is a tau number, because it is divible by the number of its divisors (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21975 + ... + 24206.

Almost surely, 2^51537996 is an apocalyptic number.

It is an amenable number.

51537996 is an abundant number, since it is smaller than the sum of its proper divisors (82943988).

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

51537996 is a wasteful number, since it uses less digits than its factorization.

51537996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46222 (or 46217 counting only the distinct ones).

The product of its digits is 255150, while the sum is 45.

The square root of 51537996 is about 7178.9968658581. The cubic root of 51537996 is about 372.1424185870.

Adding to 51537996 its sum of digits (45), we get a square (51538041 = 7179²).

The spelling of 51537996 in words is "fifty-one million, five hundred thirty-seven thousand, nine hundred ninety-six".