56777215 has 16 divisors (see below), whose sum is σ = 76891680. Its totient is φ = 39867520.

The previous prime is 56777197. The next prime is 56777239. The reversal of 56777215 is 51277765.

It is not a de Polignac number, because 56777215 - 2⁵ = 56777183 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16204 + ... + 19393.

It is an arithmetic number, because the mean of its divisors is an integer number (4805730).

Almost surely, 2^56777215 is an apocalyptic number.

56777215 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

56777215 is a deficient number, since it is larger than the sum of its proper divisors (20114465).

56777215 is a wasteful number, since it uses less digits than its factorization.

56777215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35642.

The product of its digits is 102900, while the sum is 40.

The square root of 56777215 is about 7535.0656931443. The cubic root of 56777215 is about 384.3480617867.

The spelling of 56777215 in words is "fifty-six million, seven hundred seventy-seven thousand, two hundred fifteen".