56549421 has 20 divisors (see below), whose sum is σ = 84734364. Its totient is φ = 37584000.

The previous prime is 56549419. The next prime is 56549447. The reversal of 56549421 is 12494565.

56549421 is a `hidden beast` number, since 565 + 4 + 94 + 2 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 26409321 + 30140100 = 5139^2 + 5490^2 .

It is not a de Polignac number, because 56549421 - 2¹ = 56549419 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56549401) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 31611 + ... + 33351.

Almost surely, 2^56549421 is an apocalyptic number.

It is an amenable number.

56549421 is a deficient number, since it is larger than the sum of its proper divisors (28184943).

56549421 is a wasteful number, since it uses less digits than its factorization.

56549421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2154 (or 2145 counting only the distinct ones).

The product of its digits is 43200, while the sum is 36.

The square root of 56549421 is about 7519.9349066332. The cubic root of 56549421 is about 383.8333627566.

The spelling of 56549421 in words is "fifty-six million, five hundred forty-nine thousand, four hundred twenty-one".