56551481 has 8 divisors (see below), whose sum is σ = 66005760. Its totient is φ = 47441088.

The previous prime is 56551433. The next prime is 56551483. The reversal of 56551481 is 18415565.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 56551481 - 2¹⁴ = 56535097 is a prime.

It is a super-2 number, since 2×56551481² = 6396140006586722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56551483) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 85616 + ... + 86273.

It is an arithmetic number, because the mean of its divisors is an integer number (8250720).

Almost surely, 2^56551481 is an apocalyptic number.

It is an amenable number.

56551481 is a deficient number, since it is larger than the sum of its proper divisors (9454279).

56551481 is a wasteful number, since it uses less digits than its factorization.

56551481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171943.

The product of its digits is 24000, while the sum is 35.

The square root of 56551481 is about 7520.0718746565. The cubic root of 56551481 is about 383.8380235006.

The spelling of 56551481 in words is "fifty-six million, five hundred fifty-one thousand, four hundred eighty-one".