51564005 has 16 divisors (see below), whose sum is σ = 67238400. Its totient is φ = 37817280.

The previous prime is 51563989. The next prime is 51564031. The reversal of 51564005 is 50046515.

It is not a de Polignac number, because 51564005 - 2⁴ = 51563989 is a prime.

It is a super-2 number, since 2×51564005² = 5317693223280050, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5810 + ... + 11699.

It is an arithmetic number, because the mean of its divisors is an integer number (4202400).

Almost surely, 2^51564005 is an apocalyptic number.

It is an amenable number.

51564005 is a deficient number, since it is larger than the sum of its proper divisors (15674395).

51564005 is a wasteful number, since it uses less digits than its factorization.

51564005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17564.

The product of its (nonzero) digits is 3000, while the sum is 26.

The square root of 51564005 is about 7180.8081021567. The cubic root of 51564005 is about 372.2050094596.

The spelling of 51564005 in words is "fifty-one million, five hundred sixty-four thousand, five".