56421603 has 40 divisors (see below), whose sum is σ = 97109760. Its totient is φ = 31978800.

The previous prime is 56421593. The next prime is 56421613. The reversal of 56421603 is 30612465.

56421603 is a `hidden beast` number, since 5 + 642 + 16 + 0 + 3 = 666.

It is an interprime number because it is at equal distance from previous prime (56421593) and next prime (56421613).

It is not a de Polignac number, because 56421603 - 2⁸ = 56421347 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (56421613) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 85288 + ... + 85946.

It is an arithmetic number, because the mean of its divisors is an integer number (2427744).

Almost surely, 2^56421603 is an apocalyptic number.

56421603 is a deficient number, since it is larger than the sum of its proper divisors (40688157).

56421603 is a wasteful number, since it uses less digits than its factorization.

56421603 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 829 (or 820 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 56421603 is about 7511.4314880720. The cubic root of 56421603 is about 383.5439532322.

The spelling of 56421603 in words is "fifty-six million, four hundred twenty-one thousand, six hundred three".