397165525 has 12 divisors (see below), whose sum is σ = 492814564. Its totient is φ = 317520000.

The previous prime is 397165477. The next prime is 397165529. The reversal of 397165525 is 525561793.

It can be written as a sum of positive squares in 6 ways, for example, as 30902481 + 366263044 = 5559^2 + 19138^2 .

It is a de Polignac number, because none of the positive numbers 2^k-397165525 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (397165529) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 40615 + ... + 49435.

Almost surely, 2^397165525 is an apocalyptic number.

It is an amenable number.

397165525 is a deficient number, since it is larger than the sum of its proper divisors (95649039).

397165525 is a wasteful number, since it uses less digits than its factorization.

397165525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10632 (or 10627 counting only the distinct ones).

The product of its digits is 283500, while the sum is 43.

The square root of 397165525 is about 19929.0121431043. The cubic root of 397165525 is about 735.0617900449.

It can be divided in two parts, 3971 and 65525, that added together give a palindrome (69496).

The spelling of 397165525 in words is "three hundred ninety-seven million, one hundred sixty-five thousand, five hundred twenty-five".