56117481 has 16 divisors (see below), whose sum is σ = 85647744. Its totient is φ = 32016384.

The previous prime is 56117473. The next prime is 56117491. The reversal of 56117481 is 18471165.

It is a happy number.

It is not a de Polignac number, because 56117481 - 2³ = 56117473 is a prime.

It is a super-2 number, since 2×56117481² = 6298343347570722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (56117461) 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, 14505 + ... + 17961.

It is an arithmetic number, because the mean of its divisors is an integer number (5352984).

Almost surely, 2^56117481 is an apocalyptic number.

It is an amenable number.

56117481 is a deficient number, since it is larger than the sum of its proper divisors (29530263).

56117481 is a wasteful number, since it uses less digits than its factorization.

56117481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4240.

The product of its digits is 6720, while the sum is 33.

The square root of 56117481 is about 7491.1601905179. The cubic root of 56117481 is about 382.8535890512.

The spelling of 56117481 in words is "fifty-six million, one hundred seventeen thousand, four hundred eighty-one".