57222389 has 16 divisors (see below), whose sum is σ = 66864000. Its totient is φ = 47957184.

The previous prime is 57222329. The next prime is 57222397. The reversal of 57222389 is 98322275.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-57222389 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57222329) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 143939 + ... + 144335.

It is an arithmetic number, because the mean of its divisors is an integer number (4179000).

Almost surely, 2^57222389 is an apocalyptic number.

57222389 is a gapful number since it is divisible by the number (59) formed by its first and last digit.

It is an amenable number.

57222389 is a deficient number, since it is larger than the sum of its proper divisors (9641611).

57222389 is a wasteful number, since it uses less digits than its factorization.

With its successor (57222390) it forms an eRAP, since the sums of their prime factors are consecutive (812 and 813).

57222389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 812.

The product of its digits is 60480, while the sum is 38.

The square root of 57222389 is about 7564.5481689259. The cubic root of 57222389 is about 385.3499690665.

The spelling of 57222389 in words is "fifty-seven million, two hundred twenty-two thousand, three hundred eighty-nine".