168315572 has 12 divisors (see below), whose sum is σ = 311878980. Its totient is φ = 79207296.

The previous prime is 168315571. The next prime is 168315577. The reversal of 168315572 is 275513861.

It can be written as a sum of positive squares in 2 ways, for example, as 156850576 + 11464996 = 12524^2 + 3386^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168315571) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1237547 + ... + 1237682.

It is an arithmetic number, because the mean of its divisors is an integer number (25989915).

Almost surely, 2^168315572 is an apocalyptic number.

It is an amenable number.

168315572 is a deficient number, since it is larger than the sum of its proper divisors (143563408).

168315572 is a wasteful number, since it uses less digits than its factorization.

168315572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2475250 (or 2475248 counting only the distinct ones).

The product of its digits is 50400, while the sum is 38.

The square root of 168315572 is about 12973.6491396985. The cubic root of 168315572 is about 552.1301109313.

The spelling of 168315572 in words is "one hundred sixty-eight million, three hundred fifteen thousand, five hundred seventy-two".