557221172 has 12 divisors (see below), whose sum is σ = 1032498180. Its totient is φ = 262221696.

The previous prime is 557221169. The next prime is 557221183. The reversal of 557221172 is 271122755.

It can be written as a sum of positive squares in 2 ways, for example, as 471584656 + 85636516 = 21716^2 + 9254^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4097147 + ... + 4097282.

It is an arithmetic number, because the mean of its divisors is an integer number (86041515).

Almost surely, 2^557221172 is an apocalyptic number.

It is an amenable number.

557221172 is a deficient number, since it is larger than the sum of its proper divisors (475277008).

557221172 is a wasteful number, since it uses less digits than its factorization.

557221172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8194450 (or 8194448 counting only the distinct ones).

The product of its digits is 9800, while the sum is 32.

The square root of 557221172 is about 23605.5326565617. The cubic root of 557221172 is about 822.8914244506.

It can be divided in two parts, 55 and 7221172, that added together give a palindrome (7221227).

The spelling of 557221172 in words is "five hundred fifty-seven million, two hundred twenty-one thousand, one hundred seventy-two".