51566081 has 24 divisors (see below), whose sum is σ = 61860960. Its totient is φ = 42844032.

The previous prime is 51566063. The next prime is 51566087. The reversal of 51566081 is 18066515.

It is a happy number.

It is not a de Polignac number, because 51566081 - 2²² = 47371777 is a prime.

It is a super-2 number, since 2×51566081² = 5318121419397122, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (51566087) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 370910 + ... + 371048.

It is an arithmetic number, because the mean of its divisors is an integer number (2577540).

Almost surely, 2^51566081 is an apocalyptic number.

It is an amenable number.

51566081 is a deficient number, since it is larger than the sum of its proper divisors (10294879).

51566081 is a wasteful number, since it uses less digits than its factorization.

51566081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 333 (or 326 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 32.

The square root of 51566081 is about 7180.9526526778. The cubic root of 51566081 is about 372.2100044635.

The spelling of 51566081 in words is "fifty-one million, five hundred sixty-six thousand, eighty-one".