51566091 has 8 divisors (see below), whose sum is σ = 68861760. Its totient is φ = 34323912.

The previous prime is 51566087. The next prime is 51566101. The reversal of 51566091 is 19066515.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 51566091 - 2² = 51566087 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51566041) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11065 + ... + 15018.

It is an arithmetic number, because the mean of its divisors is an integer number (8607720).

Almost surely, 2^51566091 is an apocalyptic number.

51566091 is a deficient number, since it is larger than the sum of its proper divisors (17295669).

51566091 is a wasteful number, since it uses less digits than its factorization.

51566091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26745.

The product of its (nonzero) digits is 8100, while the sum is 33.

The square root of 51566091 is about 7180.9533489642. The cubic root of 51566091 is about 372.2100285239.

The spelling of 51566091 in words is "fifty-one million, five hundred sixty-six thousand, ninety-one".