253621163 has 4 divisors (see below), whose sum is σ = 253764720. Its totient is φ = 253477608.

The previous prime is 253621133. The next prime is 253621171. The reversal of 253621163 is 361126352.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 253621163 - 2¹⁴ = 253604779 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (253621133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 69095 + ... + 72672.

It is an arithmetic number, because the mean of its divisors is an integer number (63441180).

Almost surely, 2^253621163 is an apocalyptic number.

253621163 is a deficient number, since it is larger than the sum of its proper divisors (143557).

253621163 is a wasteful number, since it uses less digits than its factorization.

253621163 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143556.

The product of its digits is 6480, while the sum is 29.

The square root of 253621163 is about 15925.4878418214. The cubic root of 253621163 is about 632.9875428785.

The spelling of 253621163 in words is "two hundred fifty-three million, six hundred twenty-one thousand, one hundred sixty-three".