57172122 has 192 divisors, whose sum is σ = 165473280. Its totient is φ = 14515200.

The previous prime is 57172117. The next prime is 57172123. The reversal of 57172122 is 22127175.

57172122 is a `hidden beast` number, since 571 + 72 + 1 + 22 = 666.

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 (57172123) by changing a digit.

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 95 ways as a sum of consecutive naturals, for example, 1394422 + ... + 1394462.

It is an arithmetic number, because the mean of its divisors is an integer number (861840).

Almost surely, 2^57172122 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 57172122, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (82736640).

57172122 is an abundant number, since it is smaller than the sum of its proper divisors (108301158).

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

57172122 is a wasteful number, since it uses less digits than its factorization.

57172122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114 (or 101 counting only the distinct ones).

The product of its digits is 1960, while the sum is 27.

The square root of 57172122 is about 7561.2249007684. The cubic root of 57172122 is about 385.2370991335.

Adding to 57172122 its reverse (22127175), we get a palindrome (79299297).

The spelling of 57172122 in words is "fifty-seven million, one hundred seventy-two thousand, one hundred twenty-two".