56271621 has 32 divisors (see below), whose sum is σ = 87920640. Its totient is φ = 31352256.

The previous prime is 56271619. The next prime is 56271623. The reversal of 56271621 is 12617265.

It is an interprime number because it is at equal distance from previous prime (56271619) and next prime (56271623).

It is not a de Polignac number, because 56271621 - 2¹ = 56271619 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56271623) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 177355 + ... + 177671.

It is an arithmetic number, because the mean of its divisors is an integer number (2747520).

Almost surely, 2^56271621 is an apocalyptic number.

It is an amenable number.

56271621 is a deficient number, since it is larger than the sum of its proper divisors (31649019).

56271621 is a wasteful number, since it uses less digits than its factorization.

56271621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 513.

The product of its digits is 5040, while the sum is 30.

The square root of 56271621 is about 7501.4412615177. The cubic root of 56271621 is about 383.2038013934.

Adding to 56271621 its reverse (12617265), we get a palindrome (68888886).

The spelling of 56271621 in words is "fifty-six million, two hundred seventy-one thousand, six hundred twenty-one".