253668244 has 6 divisors (see below), whose sum is σ = 443919434. Its totient is φ = 126834120.

The previous prime is 253668119. The next prime is 253668251. The reversal of 253668244 is 442866352.

It can be written as a sum of positive squares in only one way, i.e., 173923344 + 79744900 = 13188^2 + 8930^2 .

It is a junction number, because it is equal to n+sod(n) for n = 253668197 and 253668206.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31708527 + ... + 31708534.

Almost surely, 2^253668244 is an apocalyptic number.

It is an amenable number.

253668244 is a deficient number, since it is larger than the sum of its proper divisors (190251190).

253668244 is a wasteful number, since it uses less digits than its factorization.

253668244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63417065 (or 63417063 counting only the distinct ones).

The product of its digits is 276480, while the sum is 40.

The square root of 253668244 is about 15926.9659383073. The cubic root of 253668244 is about 633.0267086987.

The spelling of 253668244 in words is "two hundred fifty-three million, six hundred sixty-eight thousand, two hundred forty-four".