57222072 has 128 divisors (see below), whose sum is σ = 170496000. Its totient is φ = 17729280.

The previous prime is 57222047. The next prime is 57222073. The reversal of 57222072 is 27022275.

It is a happy number.

57222072 is a `hidden beast` number, since 572 + 2 + 20 + 72 = 666.

57222072 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-3 number, since 3×57222072³ (a number of 24 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57222073) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 299497 + ... + 299687.

It is an arithmetic number, because the mean of its divisors is an integer number (1332000).

Almost surely, 2^57222072 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 57222072, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (85248000).

57222072 is an abundant number, since it is smaller than the sum of its proper divisors (113273928).

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

57222072 is a wasteful number, since it uses less digits than its factorization.

57222072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 298 (or 288 counting only the distinct ones).

The product of its (nonzero) digits is 3920, while the sum is 27.

The square root of 57222072 is about 7564.5272158939. The cubic root of 57222072 is about 385.3492574793.

The spelling of 57222072 in words is "fifty-seven million, two hundred twenty-two thousand, seventy-two".