252165645 has 24 divisors (see below), whose sum is σ = 437673600. Its totient is φ = 134307936.

The previous prime is 252165611. The next prime is 252165647. The reversal of 252165645 is 546561252.

252165645 is a `hidden beast` number, since 2 + 5 + 2 + 1 + 6 + 5 + 645 = 666.

It is not a de Polignac number, because 252165645 - 2⁶ = 252165581 is a prime.

It is a super-3 number, since 3×252165645³ (a number of 26 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (252165647) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 34416 + ... + 41094.

It is an arithmetic number, because the mean of its divisors is an integer number (18236400).

Almost surely, 2^252165645 is an apocalyptic number.

It is an amenable number.

252165645 is a deficient number, since it is larger than the sum of its proper divisors (185507955).

252165645 is a wasteful number, since it uses less digits than its factorization.

252165645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7529 (or 7526 counting only the distinct ones).

The product of its digits is 72000, while the sum is 36.

The square root of 252165645 is about 15879.7243363983. The cubic root of 252165645 is about 631.7743254036.

The spelling of 252165645 in words is "two hundred fifty-two million, one hundred sixty-five thousand, six hundred forty-five".