55720083 has 8 divisors (see below), whose sum is σ = 74749888. Its totient is φ = 36918504.

The previous prime is 55720073. The next prime is 55720109. The reversal of 55720083 is 38002755.

It is a happy number.

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

It is not a de Polignac number, because 55720083 - 2⁸ = 55719827 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 55720083.

It is not an unprimeable number, because it can be changed into a prime (55720003) 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, 56485 + ... + 57462.

It is an arithmetic number, because the mean of its divisors is an integer number (9343736).

Almost surely, 2^55720083 is an apocalyptic number.

55720083 is a deficient number, since it is larger than the sum of its proper divisors (19029805).

55720083 is a wasteful number, since it uses less digits than its factorization.

55720083 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114113.

The product of its (nonzero) digits is 8400, while the sum is 30.

The square root of 55720083 is about 7464.5886021937. The cubic root of 55720083 is about 381.9477167738.

The spelling of 55720083 in words is "fifty-five million, seven hundred twenty thousand, eighty-three".