56518415 has 4 divisors (see below), whose sum is σ = 67822104. Its totient is φ = 45214728.

The previous prime is 56518411. The next prime is 56518463. The reversal of 56518415 is 51481565.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 56518415 - 2² = 56518411 is a prime.

It is a super-2 number, since 2×56518415² = 6388662468224450, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56518411) 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, 5651837 + ... + 5651846.

It is an arithmetic number, because the mean of its divisors is an integer number (16955526).

Almost surely, 2^56518415 is an apocalyptic number.

56518415 is a deficient number, since it is larger than the sum of its proper divisors (11303689).

56518415 is a wasteful number, since it uses less digits than its factorization.

56518415 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11303688.

The product of its digits is 24000, while the sum is 35.

The square root of 56518415 is about 7517.8730369700. The cubic root of 56518415 is about 383.7631980946.

The spelling of 56518415 in words is "fifty-six million, five hundred eighteen thousand, four hundred fifteen".