56211665 has 8 divisors (see below), whose sum is σ = 67549248. Its totient is φ = 44905840.

The previous prime is 56211653. The next prime is 56211677. The reversal of 56211665 is 56611265.

It is an interprime number because it is at equal distance from previous prime (56211653) and next prime (56211677).

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

It is a de Polignac number, because none of the positive numbers 2^k-56211665 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3851 + ... + 11280.

It is an arithmetic number, because the mean of its divisors is an integer number (8443656).

Almost surely, 2^56211665 is an apocalyptic number.

It is an amenable number.

56211665 is a deficient number, since it is larger than the sum of its proper divisors (11337583).

56211665 is a wasteful number, since it uses less digits than its factorization.

56211665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15879.

The product of its digits is 10800, while the sum is 32.

The square root of 56211665 is about 7497.4438977561. The cubic root of 56211665 is about 383.0676550173.

The spelling of 56211665 in words is "fifty-six million, two hundred eleven thousand, six hundred sixty-five".