253643525 has 12 divisors (see below), whose sum is σ = 314764452. Its totient is φ = 202755840.

The previous prime is 253643513. The next prime is 253643557. The reversal of 253643525 is 525346352.

253643525 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 6 ways, for example, as 25542916 + 228100609 = 5054^2 + 15103^2 .

It is not a de Polignac number, because 253643525 - 2⁶ = 253643461 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 36749 + ... + 43101.

It is an arithmetic number, because the mean of its divisors is an integer number (26230371).

Almost surely, 2^253643525 is an apocalyptic number.

253643525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

253643525 is a deficient number, since it is larger than the sum of its proper divisors (61120927).

253643525 is a wasteful number, since it uses less digits than its factorization.

253643525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7960 (or 7955 counting only the distinct ones).

The product of its digits is 108000, while the sum is 35.

The square root of 253643525 is about 15926.1899084495. The cubic root of 253643525 is about 633.0061460204.

Adding to 253643525 its reverse (525346352), we get a palindrome (778989877).

The spelling of 253643525 in words is "two hundred fifty-three million, six hundred forty-three thousand, five hundred twenty-five".