252511505 has 4 divisors (see below), whose sum is σ = 303013812. Its totient is φ = 202009200.

The previous prime is 252511499. The next prime is 252511529. The reversal of 252511505 is 505115252.

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

It can be written as a sum of positive squares in 2 ways, for example, as 27541504 + 224970001 = 5248^2 + 14999^2 .

It is not a de Polignac number, because 252511505 - 2²⁶ = 185402641 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25251146 + ... + 25251155.

It is an arithmetic number, because the mean of its divisors is an integer number (75753453).

Almost surely, 2^252511505 is an apocalyptic number.

It is an amenable number.

252511505 is a deficient number, since it is larger than the sum of its proper divisors (50502307).

252511505 is an equidigital number, since it uses as much as digits as its factorization.

252511505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50502306.

The product of its (nonzero) digits is 2500, while the sum is 26.

The square root of 252511505 is about 15890.6105924222. The cubic root of 252511505 is about 632.0630319885.

Adding to 252511505 its reverse (505115252), we get a palindrome (757626757).

The spelling of 252511505 in words is "two hundred fifty-two million, five hundred eleven thousand, five hundred five".