252655989 has 16 divisors (see below), whose sum is σ = 372200832. Its totient is φ = 151635968.

The previous prime is 252655969. The next prime is 252655999. The reversal of 252655989 is 989556252.

It is a cyclic number.

It is not a de Polignac number, because 252655989 - 2⁵ = 252655957 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (252655969) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 106524 + ... + 108869.

It is an arithmetic number, because the mean of its divisors is an integer number (23262552).

Almost surely, 2^252655989 is an apocalyptic number.

It is an amenable number.

252655989 is a deficient number, since it is larger than the sum of its proper divisors (119544843).

252655989 is a wasteful number, since it uses less digits than its factorization.

252655989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 215436.

The product of its digits is 1944000, while the sum is 51.

The square root of 252655989 is about 15895.1561489656. The cubic root of 252655989 is about 632.1835619193.

The spelling of 252655989 in words is "two hundred fifty-two million, six hundred fifty-five thousand, nine hundred eighty-nine".