51537552 has 40 divisors (see below), whose sum is σ = 145243680. Its totient is φ = 15617280.

The previous prime is 51537547. The next prime is 51537569. The reversal of 51537552 is 25573515.

It is a super-2 number, since 2×51537552² = 5312238532305408, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48277 + ... + 49332.

It is an arithmetic number, because the mean of its divisors is an integer number (3631092).

Almost surely, 2^51537552 is an apocalyptic number.

It is an amenable number.

51537552 is an abundant number, since it is smaller than the sum of its proper divisors (93706128).

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

51537552 is a wasteful number, since it uses less digits than its factorization.

51537552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97631 (or 97625 counting only the distinct ones).

The product of its digits is 26250, while the sum is 33.

The square root of 51537552 is about 7178.9659422510. The cubic root of 51537552 is about 372.1413499145.

The spelling of 51537552 in words is "fifty-one million, five hundred thirty-seven thousand, five hundred fifty-two".