56537 has 4 divisors (see below), whose sum is σ = 60900. Its totient is φ = 52176.

The previous prime is 56533. The next prime is 56543. The reversal of 56537 is 73565.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 73565 = 5 ⋅14713.

It can be written as a sum of positive squares in 2 ways, for example, as 4096 + 52441 = 64^2 + 229^2 .

It is a cyclic number.

It is not a de Polignac number, because 56537 - 2² = 56533 is a prime.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 56537.

It is not an unprimeable number, because it can be changed into a prime (56531) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2162 + ... + 2187.

It is an arithmetic number, because the mean of its divisors is an integer number (15225).

2⁵⁶⁵³⁷ is an apocalyptic number.

It is an amenable number.

56537 is a deficient number, since it is larger than the sum of its proper divisors (4363).

56537 is a wasteful number, since it uses less digits than its factorization.

56537 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4362.

The product of its digits is 3150, while the sum is 26.

The square root of 56537 is about 237.7751038271. The cubic root of 56537 is about 38.3805257881.

The spelling of 56537 in words is "fifty-six thousand, five hundred thirty-seven".