56215667 has 4 divisors (see below), whose sum is σ = 56234376. Its totient is φ = 56196960.

The previous prime is 56215589. The next prime is 56215673. The reversal of 56215667 is 76651265.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 76651265 = 5 ⋅15330253.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56215667 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 56215667.

It is not an unprimeable number, because it can be changed into a prime (56215697) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3713 + ... + 11234.

It is an arithmetic number, because the mean of its divisors is an integer number (14058594).

Almost surely, 2^56215667 is an apocalyptic number.

56215667 is a deficient number, since it is larger than the sum of its proper divisors (18709).

56215667 is a wasteful number, since it uses less digits than its factorization.

56215667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18708.

The product of its digits is 75600, while the sum is 38.

The square root of 56215667 is about 7497.7107839660. The cubic root of 56215667 is about 383.0767456593.

The spelling of 56215667 in words is "fifty-six million, two hundred fifteen thousand, six hundred sixty-seven".