55721675 has 6 divisors (see below), whose sum is σ = 69094908. Its totient is φ = 44577320.

The previous prime is 55721671. The next prime is 55721693. The reversal of 55721675 is 57612755.

It is not a de Polignac number, because 55721675 - 2² = 55721671 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55721671) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1114409 + ... + 1114458.

It is an arithmetic number, because the mean of its divisors is an integer number (11515818).

Almost surely, 2^55721675 is an apocalyptic number.

55721675 is a deficient number, since it is larger than the sum of its proper divisors (13373233).

55721675 is a wasteful number, since it uses less digits than its factorization.

55721675 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2228877 (or 2228872 counting only the distinct ones).

The product of its digits is 73500, while the sum is 38.

The square root of 55721675 is about 7464.6952382532. The cubic root of 55721675 is about 381.9513543311.

The spelling of 55721675 in words is "fifty-five million, seven hundred twenty-one thousand, six hundred seventy-five".