56551385 has 8 divisors (see below), whose sum is σ = 74030976. Its totient is φ = 41128240.

The previous prime is 56551379. The next prime is 56551393. The reversal of 56551385 is 58315565.

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

It is not a de Polignac number, because 56551385 - 2¹⁸ = 56289241 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, 514049 + ... + 514158.

It is an arithmetic number, because the mean of its divisors is an integer number (9253872).

Almost surely, 2^56551385 is an apocalyptic number.

56551385 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

56551385 is a deficient number, since it is larger than the sum of its proper divisors (17479591).

56551385 is a wasteful number, since it uses less digits than its factorization.

56551385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1028223.

The product of its digits is 90000, while the sum is 38.

The square root of 56551385 is about 7520.0654917361. The cubic root of 56551385 is about 383.8378063034.

The spelling of 56551385 in words is "fifty-six million, five hundred fifty-one thousand, three hundred eighty-five".