252511645 has 16 divisors (see below), whose sum is σ = 306005040. Its totient is φ = 200026624.

The previous prime is 252511639. The next prime is 252511669. The reversal of 252511645 is 546115252.

252511645 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 8 ways, for example, as 749956 + 251761689 = 866^2 + 15867^2 .

It is a cyclic number.

It is not a de Polignac number, because 252511645 - 2¹⁷ = 252380573 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 264489 + ... + 265441.

It is an arithmetic number, because the mean of its divisors is an integer number (19125315).

Almost surely, 2^252511645 is an apocalyptic number.

It is an amenable number.

252511645 is a deficient number, since it is larger than the sum of its proper divisors (53493395).

252511645 is a wasteful number, since it uses less digits than its factorization.

252511645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1424.

The product of its digits is 12000, while the sum is 31.

The square root of 252511645 is about 15890.6149975386. The cubic root of 252511645 is about 632.0631488001.

Adding to 252511645 its reverse (546115252), we get a palindrome (798626897).

It can be divided in two parts, 25251 and 1645, that added together give a square (26896 = 164²).

The spelling of 252511645 in words is "two hundred fifty-two million, five hundred eleven thousand, six hundred forty-five".