252621607 has 12 divisors (see below), whose sum is σ = 301810440. Its totient is φ = 210679056.

The previous prime is 252621559. The next prime is 252621613. The reversal of 252621607 is 706126252.

It is a de Polignac number, because none of the positive numbers 2^k-252621607 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 (252621617) 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, 67857 + ... + 71482.

It is an arithmetic number, because the mean of its divisors is an integer number (25150870).

Almost surely, 2^252621607 is an apocalyptic number.

252621607 is a deficient number, since it is larger than the sum of its proper divisors (49188833).

252621607 is a wasteful number, since it uses less digits than its factorization.

252621607 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139390 (or 139383 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 31.

The square root of 252621607 is about 15894.0745877198. The cubic root of 252621607 is about 632.1548842941.

Adding to 252621607 its reverse (706126252), we get a palindrome (958747859).

The spelling of 252621607 in words is "two hundred fifty-two million, six hundred twenty-one thousand, six hundred seven".