56278551 has 32 divisors (see below), whose sum is σ = 95592960. Its totient is φ = 28670976.

The previous prime is 56278549. The next prime is 56278567. The reversal of 56278551 is 15587265.

It is not a de Polignac number, because 56278551 - 2¹ = 56278549 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56278151) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2635 + ... + 10931.

It is an arithmetic number, because the mean of its divisors is an integer number (2987280).

Almost surely, 2^56278551 is an apocalyptic number.

56278551 is a gapful number since it is divisible by the number (51) formed by its first and last digit.

56278551 is a deficient number, since it is larger than the sum of its proper divisors (39314409).

56278551 is a wasteful number, since it uses less digits than its factorization.

56278551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8343.

The product of its digits is 84000, while the sum is 39.

The square root of 56278551 is about 7501.9031585325. The cubic root of 56278551 is about 383.2195316040.

The spelling of 56278551 in words is "fifty-six million, two hundred seventy-eight thousand, five hundred fifty-one".