252440015 has 4 divisors (see below), whose sum is σ = 302928024. Its totient is φ = 201952008.

The previous prime is 252440009. The next prime is 252440017. The reversal of 252440015 is 510044252.

It is a happy number.

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 252440015 - 2²⁴ = 235662799 is a prime.

It is a super-2 number, since 2×252440015² = 127451922346400450, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (252440017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25243997 + ... + 25244006.

It is an arithmetic number, because the mean of its divisors is an integer number (75732006).

Almost surely, 2^252440015 is an apocalyptic number.

252440015 is a deficient number, since it is larger than the sum of its proper divisors (50488009).

252440015 is an equidigital number, since it uses as much as digits as its factorization.

252440015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50488008.

The product of its (nonzero) digits is 1600, while the sum is 23.

The square root of 252440015 is about 15888.3609916190. The cubic root of 252440015 is about 632.0033773454.

Adding to 252440015 its reverse (510044252), we get a palindrome (762484267).

The spelling of 252440015 in words is "two hundred fifty-two million, four hundred forty thousand, fifteen".