56431549 has 6 divisors (see below), whose sum is σ = 57999354. Its totient is φ = 54905040.

The previous prime is 56431547. The next prime is 56431567. The reversal of 56431549 is 94513465.

It can be written as a sum of positive squares in 3 ways, for example, as 21325924 + 35105625 = 4618^2 + 5925^2 .

It is not a de Polignac number, because 56431549 - 2¹ = 56431547 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56431541) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 19242 + ... + 21979.

It is an arithmetic number, because the mean of its divisors is an integer number (9666559).

Almost surely, 2^56431549 is an apocalyptic number.

It is an amenable number.

56431549 is a deficient number, since it is larger than the sum of its proper divisors (1567805).

56431549 is an equidigital number, since it uses as much as digits as its factorization.

56431549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41295 (or 41258 counting only the distinct ones).

The product of its digits is 64800, while the sum is 37.

The square root of 56431549 is about 7512.0935164573. The cubic root of 56431549 is about 383.5664889504.

The spelling of 56431549 in words is "fifty-six million, four hundred thirty-one thousand, five hundred forty-nine".