56432281 has 4 divisors (see below), whose sum is σ = 57112272. Its totient is φ = 55752292.

The previous prime is 56432279. The next prime is 56432293. The reversal of 56432281 is 18223465.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 56432281 - 2¹ = 56432279 is a prime.

It is a super-2 number, since 2×56432281² = 6369204677725922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56432681) 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, 339871 + ... + 340036.

It is an arithmetic number, because the mean of its divisors is an integer number (14278068).

Almost surely, 2^56432281 is an apocalyptic number.

It is an amenable number.

56432281 is a deficient number, since it is larger than the sum of its proper divisors (679991).

56432281 is an equidigital number, since it uses as much as digits as its factorization.

56432281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 679990.

The product of its digits is 11520, while the sum is 31.

The square root of 56432281 is about 7512.1422377375. The cubic root of 56432281 is about 383.5681474166.

The spelling of 56432281 in words is "fifty-six million, four hundred thirty-two thousand, two hundred eighty-one".