57221273 has 4 divisors (see below), whose sum is σ = 57262800. Its totient is φ = 57179748.

The previous prime is 57221267. The next prime is 57221287. The reversal of 57221273 is 37212275.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-57221273 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (56221273) 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 3 ways as a sum of consecutive naturals, for example, 18623 + ... + 21476.

It is an arithmetic number, because the mean of its divisors is an integer number (14315700).

Almost surely, 2^57221273 is an apocalyptic number.

It is an amenable number.

57221273 is a deficient number, since it is larger than the sum of its proper divisors (41527).

57221273 is a wasteful number, since it uses less digits than its factorization.

57221273 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41526.

The product of its digits is 5880, while the sum is 29.

The square root of 57221273 is about 7564.4744034202. The cubic root of 57221273 is about 385.3474639086.

The spelling of 57221273 in words is "fifty-seven million, two hundred twenty-one thousand, two hundred seventy-three".