56861555 has 8 divisors (see below), whose sum is σ = 68280000. Its totient is φ = 45458496.

The previous prime is 56861551. The next prime is 56861569. The reversal of 56861555 is 55516865.

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 56861555 - 2² = 56861551 is a prime.

It is not an unprimeable number, because it can be changed into a prime (56861551) 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, 7151 + ... + 12839.

It is an arithmetic number, because the mean of its divisors is an integer number (8535000).

Almost surely, 2^56861555 is an apocalyptic number.

56861555 is a deficient number, since it is larger than the sum of its proper divisors (11418445).

56861555 is a wasteful number, since it uses less digits than its factorization.

56861555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7693.

The product of its digits is 180000, while the sum is 41.

The square root of 56861555 is about 7540.6601169924. The cubic root of 56861555 is about 384.5382782199.

The spelling of 56861555 in words is "fifty-six million, eight hundred sixty-one thousand, five hundred fifty-five".