56451985 has 8 divisors (see below), whose sum is σ = 71727336. Its totient is φ = 42504960.

The previous prime is 56451979. The next prime is 56452001. The reversal of 56451985 is 58915465.

It can be written as a sum of positive squares in 4 ways, for example, as 919681 + 55532304 = 959^2 + 7452^2 .

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

It is not a de Polignac number, because 56451985 - 2³ = 56451977 is a prime.

It is a super-2 number, since 2×56451985² = 6373653220880450, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 331986 + ... + 332155.

It is an arithmetic number, because the mean of its divisors is an integer number (8965917).

Almost surely, 2^56451985 is an apocalyptic number.

It is an amenable number.

56451985 is a deficient number, since it is larger than the sum of its proper divisors (15275351).

56451985 is a wasteful number, since it uses less digits than its factorization.

56451985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 664163.

The product of its digits is 216000, while the sum is 43.

The square root of 56451985 is about 7513.4536000431. The cubic root of 56451985 is about 383.6127846773.

The spelling of 56451985 in words is "fifty-six million, four hundred fifty-one thousand, nine hundred eighty-five".