51056091 has 12 divisors (see below), whose sum is σ = 74056840. Its totient is φ = 33894720.

The previous prime is 51056087. The next prime is 51056099. The reversal of 51056091 is 19065015.

51056091 is a `hidden beast` number, since 5 + 10 + 560 + 91 = 666.

It is not a de Polignac number, because 51056091 - 2² = 51056087 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51056099) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9601 + ... + 13938.

Almost surely, 2^51056091 is an apocalyptic number.

51056091 is a deficient number, since it is larger than the sum of its proper divisors (23000749).

51056091 is a wasteful number, since it uses less digits than its factorization.

51056091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23786 (or 23783 counting only the distinct ones).

The product of its (nonzero) digits is 1350, while the sum is 27.

The square root of 51056091 is about 7145.3545048514. The cubic root of 51056091 is about 370.9788810592.

It can be divided in two parts, 5105609 and 1, that added together give a triangular number (5105610 = T₃₁₉₅).

The spelling of 51056091 in words is "fifty-one million, fifty-six thousand, ninety-one".