56015691 has 8 divisors (see below), whose sum is σ = 74867520. Its totient is φ = 37253832.

The previous prime is 56015689. The next prime is 56015693. The reversal of 56015691 is 19651065.

It is an interprime number because it is at equal distance from previous prime (56015689) and next prime (56015693).

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

It is not a de Polignac number, because 56015691 - 2¹ = 56015689 is a prime.

It is not an unprimeable number, because it can be changed into a prime (56015693) 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, 21025 + ... + 23538.

It is an arithmetic number, because the mean of its divisors is an integer number (9358440).

Almost surely, 2^56015691 is an apocalyptic number.

56015691 is a deficient number, since it is larger than the sum of its proper divisors (18851829).

56015691 is a wasteful number, since it uses less digits than its factorization.

56015691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44985.

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

The square root of 56015691 is about 7484.3630991555. The cubic root of 56015691 is about 382.6219663166.

The spelling of 56015691 in words is "fifty-six million, fifteen thousand, six hundred ninety-one".