55723170 has 16 divisors (see below), whose sum is σ = 133735680. Its totient is φ = 14859504.

The previous prime is 55723159. The next prime is 55723177. The reversal of 55723170 is 7132755.

It is a Harshad number since it is a multiple of its sum of digits (30), and also a Moran number because the ratio is a prime number: 1857439 = 55723170 / (5 + 5 + 7 + 2 + 3 + 1 + 7 + 0).

It is not an unprimeable number, because it can be changed into a prime (55723177) 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, 928690 + ... + 928749.

It is an arithmetic number, because the mean of its divisors is an integer number (8358480).

Almost surely, 2^55723170 is an apocalyptic number.

55723170 is an abundant number, since it is smaller than the sum of its proper divisors (78012510).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

55723170 is a wasteful number, since it uses less digits than its factorization.

55723170 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1857449.

The product of its (nonzero) digits is 7350, while the sum is 30.

The square root of 55723170 is about 7464.7953756282. The cubic root of 55723170 is about 381.9547701901.

The spelling of 55723170 in words is "fifty-five million, seven hundred twenty-three thousand, one hundred seventy".