253538557 has 4 divisors (see below), whose sum is σ = 254866176. Its totient is φ = 252210940.

The previous prime is 253538543. The next prime is 253538599. The reversal of 253538557 is 755835352.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 253538557 - 2¹⁹ = 253014269 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (253338557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 663523 + ... + 663904.

It is an arithmetic number, because the mean of its divisors is an integer number (63716544).

Almost surely, 2^253538557 is an apocalyptic number.

It is an amenable number.

253538557 is a deficient number, since it is larger than the sum of its proper divisors (1327619).

253538557 is a wasteful number, since it uses less digits than its factorization.

253538557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1327618.

The product of its digits is 630000, while the sum is 43.

The square root of 253538557 is about 15922.8941150785. The cubic root of 253538557 is about 632.9188127480.

The spelling of 253538557 in words is "two hundred fifty-three million, five hundred thirty-eight thousand, five hundred fifty-seven".