252388091 has 4 divisors (see below), whose sum is σ = 252470472. Its totient is φ = 252305712.

The previous prime is 252388061. The next prime is 252388093. The reversal of 252388091 is 190883252.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 252388091 - 2¹⁸ = 252125947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (252388093) 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, 36410 + ... + 42783.

It is an arithmetic number, because the mean of its divisors is an integer number (63117618).

Almost surely, 2^252388091 is an apocalyptic number.

252388091 is a deficient number, since it is larger than the sum of its proper divisors (82381).

252388091 is an equidigital number, since it uses as much as digits as its factorization.

252388091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82380.

The product of its (nonzero) digits is 34560, while the sum is 38.

The square root of 252388091 is about 15886.7268812679. The cubic root of 252388091 is about 631.9600424385.

The spelling of 252388091 in words is "two hundred fifty-two million, three hundred eighty-eight thousand, ninety-one".