57172266 has 24 divisors (see below), whose sum is σ = 126212580. Its totient is φ = 18697536.

The previous prime is 57172261. The next prime is 57172301. The reversal of 57172266 is 66227175.

57172266 is a `hidden beast` number, since 571 + 7 + 22 + 66 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 56025225 + 1147041 = 7485^2 + 1071^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 57172266.

It is not an unprimeable number, because it can be changed into a prime (57172261) 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 11 ways as a sum of consecutive naturals, for example, 29011 + ... + 30918.

Almost surely, 2^57172266 is an apocalyptic number.

57172266 is an abundant number, since it is smaller than the sum of its proper divisors (69040314).

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

57172266 is a wasteful number, since it uses less digits than its factorization.

57172266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59990 (or 59987 counting only the distinct ones).

The product of its digits is 35280, while the sum is 36.

The square root of 57172266 is about 7561.2344230291. The cubic root of 57172266 is about 385.2374225668.

The spelling of 57172266 in words is "fifty-seven million, one hundred seventy-two thousand, two hundred sixty-six".