253522553 has 4 divisors (see below), whose sum is σ = 262264740. Its totient is φ = 244780368.

The previous prime is 253522543. The next prime is 253522561. The reversal of 253522553 is 355225352.

It is a happy number.

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 100060009 + 153462544 = 10003^2 + 12388^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-253522553 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (253522523) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4371050 + ... + 4371107.

It is an arithmetic number, because the mean of its divisors is an integer number (65566185).

Almost surely, 2^253522553 is an apocalyptic number.

It is an amenable number.

253522553 is a deficient number, since it is larger than the sum of its proper divisors (8742187).

253522553 is an equidigital number, since it uses as much as digits as its factorization.

253522553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8742186.

The product of its digits is 45000, while the sum is 32.

The square root of 253522553 is about 15922.3915603153. The cubic root of 253522553 is about 632.9054953182.

The spelling of 253522553 in words is "two hundred fifty-three million, five hundred twenty-two thousand, five hundred fifty-three".