51565037 has 4 divisors (see below), whose sum is σ = 51580380. Its totient is φ = 51549696.

The previous prime is 51565001. The next prime is 51565043. The reversal of 51565037 is 73056515.

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 15792676 + 35772361 = 3974^2 + 5981^2 .

It is a cyclic number.

It is not a de Polignac number, because 51565037 - 2⁶ = 51564973 is a prime.

It is a super-2 number, since 2×51565037² = 5317906081622738, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51564994 and 51565012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51565337) 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, 212 + ... + 10157.

It is an arithmetic number, because the mean of its divisors is an integer number (12895095).

Almost surely, 2^51565037 is an apocalyptic number.

It is an amenable number.

51565037 is a deficient number, since it is larger than the sum of its proper divisors (15343).

51565037 is a wasteful number, since it uses less digits than its factorization.

51565037 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15342.

The product of its (nonzero) digits is 15750, while the sum is 32.

The square root of 51565037 is about 7180.8799600049. The cubic root of 51565037 is about 372.2074925419.

The spelling of 51565037 in words is "fifty-one million, five hundred sixty-five thousand, thirty-seven".