253664533 has 4 divisors (see below), whose sum is σ = 253897708. Its totient is φ = 253431360.

The previous prime is 253664501. The next prime is 253664549. The reversal of 253664533 is 335466352.

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 248314564 + 5349969 = 15758^2 + 2313^2 .

It is a cyclic number.

It is not a de Polignac number, because 253664533 - 2⁵ = 253664501 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 253664492 and 253664501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (253664233) 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, 114948 + ... + 117133.

It is an arithmetic number, because the mean of its divisors is an integer number (63474427).

Almost surely, 2^253664533 is an apocalyptic number.

It is an amenable number.

253664533 is a deficient number, since it is larger than the sum of its proper divisors (233175).

253664533 is a wasteful number, since it uses less digits than its factorization.

253664533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 233174.

The product of its digits is 194400, while the sum is 37.

The square root of 253664533 is about 15926.8494373495. The cubic root of 253664533 is about 633.0236217618.

The spelling of 253664533 in words is "two hundred fifty-three million, six hundred sixty-four thousand, five hundred thirty-three".