56641481 has 4 divisors (see below), whose sum is σ = 60998532. Its totient is φ = 52284432.

The previous prime is 56641477. The next prime is 56641483. The reversal of 56641481 is 18414665.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 18414665 = 5 ⋅3682933.

It can be written as a sum of positive squares in 2 ways, for example, as 16128256 + 40513225 = 4016^2 + 6365^2 .

It is a cyclic number.

It is not a de Polignac number, because 56641481 - 2² = 56641477 is a prime.

It is a super-2 number, since 2×56641481² = 6416514739746722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56641483) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2178506 + ... + 2178531.

It is an arithmetic number, because the mean of its divisors is an integer number (15249633).

Almost surely, 2^56641481 is an apocalyptic number.

It is an amenable number.

56641481 is a deficient number, since it is larger than the sum of its proper divisors (4357051).

56641481 is a wasteful number, since it uses less digits than its factorization.

56641481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4357050.

The product of its digits is 23040, while the sum is 35.

The square root of 56641481 is about 7526.0534810749. The cubic root of 56641481 is about 384.0415378424.

The spelling of 56641481 in words is "fifty-six million, six hundred forty-one thousand, four hundred eighty-one".