56421013 has 16 divisors (see below), whose sum is σ = 65390400. Its totient is φ = 48142080.

The previous prime is 56420971. The next prime is 56421017. The reversal of 56421013 is 31012465.

It is a cyclic number.

It is not a de Polignac number, because 56421013 - 2¹³ = 56412821 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56421017) 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, 22423 + ... + 24811.

It is an arithmetic number, because the mean of its divisors is an integer number (4086900).

Almost surely, 2^56421013 is an apocalyptic number.

It is an amenable number.

56421013 is a deficient number, since it is larger than the sum of its proper divisors (8969387).

56421013 is a wasteful number, since it uses less digits than its factorization.

56421013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2532.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 56421013 is about 7511.3922144966. The cubic root of 56421013 is about 383.5426163228.

Adding to 56421013 its reverse (31012465), we get a palindrome (87433478).

The spelling of 56421013 in words is "fifty-six million, four hundred twenty-one thousand, thirteen".