56810137 has 4 divisors (see below), whose sum is σ = 56828980. Its totient is φ = 56791296.

The previous prime is 56810113. The next prime is 56810167. The reversal of 56810137 is 73101865.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 37896336 + 18913801 = 6156^2 + 4349^2 .

It is a 3-Lehmer number, since φ(56810137) divides (56810137-1)³.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56810137 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 56810099 and 56810108.

It is not an unprimeable number, because it can be changed into a prime (56810167) 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, 3768 + ... + 11305.

It is an arithmetic number, because the mean of its divisors is an integer number (14207245).

It is a Poulet number, since it divides 2^56810136-1.

Almost surely, 2^56810137 is an apocalyptic number.

56810137 is the 3769-th decagonal number.

It is an amenable number.

56810137 is a deficient number, since it is larger than the sum of its proper divisors (18843).

56810137 is a wasteful number, since it uses less digits than its factorization.

56810137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18842.

The product of its (nonzero) digits is 5040, while the sum is 31.

The square root of 56810137 is about 7537.2499626853. The cubic root of 56810137 is about 384.4223349025.

The spelling of 56810137 in words is "fifty-six million, eight hundred ten thousand, one hundred thirty-seven".