55722270 has 32 divisors (see below), whose sum is σ = 134069760. Its totient is φ = 14821920.

The previous prime is 55722263. The next prime is 55722319. The reversal of 55722270 is 7222755.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11055 + ... + 15285.

It is an arithmetic number, because the mean of its divisors is an integer number (4189680).

Almost surely, 2^55722270 is an apocalyptic number.

55722270 is an abundant number, since it is smaller than the sum of its proper divisors (78347490).

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

55722270 is a wasteful number, since it uses less digits than its factorization.

55722270 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4680.

The product of its (nonzero) digits is 9800, while the sum is 30.

The square root of 55722270 is about 7464.7350924196. The cubic root of 55722270 is about 381.9527138274.

It can be divided in two parts, 5 and 5722270, that added together give a palindrome (5722275).

The spelling of 55722270 in words is "fifty-five million, seven hundred twenty-two thousand, two hundred seventy".