252521515 has 8 divisors (see below), whose sum is σ = 303185088. Its totient is φ = 201911040.

The previous prime is 252521491. The next prime is 252521539. The reversal of 252521515 is 515125252.

252521515 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (252521491) and next prime (252521539).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 252521515 - 2⁷ = 252521387 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1926 + ... + 22555.

It is an arithmetic number, because the mean of its divisors is an integer number (37898136).

Almost surely, 2^252521515 is an apocalyptic number.

252521515 is a deficient number, since it is larger than the sum of its proper divisors (50663573).

252521515 is a wasteful number, since it uses less digits than its factorization.

252521515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26549.

The product of its digits is 5000, while the sum is 28.

The square root of 252521515 is about 15890.9255551714. The cubic root of 252521515 is about 632.0713839080.

Adding to 252521515 its reverse (515125252), we get a palindrome (767646767).

The spelling of 252521515 in words is "two hundred fifty-two million, five hundred twenty-one thousand, five hundred fifteen".