56091511 has 8 divisors (see below), whose sum is σ = 64766240. Its totient is φ = 47582208.

The previous prime is 56091467. The next prime is 56091527. The reversal of 56091511 is 11519065.

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

It is a cyclic number.

It is not a de Polignac number, because 56091511 - 2⁷ = 56091383 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 56091511.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56091311) 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, 40626 + ... + 41983.

It is an arithmetic number, because the mean of its divisors is an integer number (8095780).

Almost surely, 2^56091511 is an apocalyptic number.

56091511 is a deficient number, since it is larger than the sum of its proper divisors (8674729).

56091511 is an equidigital number, since it uses as much as digits as its factorization.

56091511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82713.

The product of its (nonzero) digits is 1350, while the sum is 28.

The square root of 56091511 is about 7489.4266135666. The cubic root of 56091511 is about 382.7945210526.

The spelling of 56091511 in words is "fifty-six million, ninety-one thousand, five hundred eleven".