51537457 has 4 divisors (see below), whose sum is σ = 53778240. Its totient is φ = 49296676.

The previous prime is 51537401. The next prime is 51537463. The reversal of 51537457 is 75473515.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 51537457 - 2¹¹ = 51535409 is a prime.

It is a super-2 number, since 2×51537457² = 5312218948053698, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51507457) 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 3 ways as a sum of consecutive naturals, for example, 1120357 + ... + 1120402.

It is an arithmetic number, because the mean of its divisors is an integer number (13444560).

Almost surely, 2^51537457 is an apocalyptic number.

It is an amenable number.

51537457 is a deficient number, since it is larger than the sum of its proper divisors (2240783).

51537457 is a wasteful number, since it uses less digits than its factorization.

51537457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2240782.

The product of its digits is 73500, while the sum is 37.

The square root of 51537457 is about 7178.9593256962. The cubic root of 51537457 is about 372.1411212564.

The spelling of 51537457 in words is "fifty-one million, five hundred thirty-seven thousand, four hundred fifty-seven".