56421507 has 16 divisors (see below), whose sum is σ = 82632960. Its totient is φ = 34084512.

The previous prime is 56421503. The next prime is 56421557. The reversal of 56421507 is 70512465.

It is not a de Polignac number, because 56421507 - 2² = 56421503 is a prime.

It is not an unprimeable number, because it can be changed into a prime (56421503) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20208 + ... + 22829.

It is an arithmetic number, because the mean of its divisors is an integer number (5164560).

Almost surely, 2^56421507 is an apocalyptic number.

56421507 is a gapful number since it is divisible by the number (57) formed by its first and last digit.

56421507 is a deficient number, since it is larger than the sum of its proper divisors (26211453).

56421507 is a wasteful number, since it uses less digits than its factorization.

56421507 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43082.

The product of its (nonzero) digits is 8400, while the sum is 30.

The square root of 56421507 is about 7511.4250978093. The cubic root of 56421507 is about 383.5437357018.

The spelling of 56421507 in words is "fifty-six million, four hundred twenty-one thousand, five hundred seven".