253668242 has 16 divisors (see below), whose sum is σ = 399252672. Its totient is φ = 120645360.

The previous prime is 253668119. The next prime is 253668251. The reversal of 253668242 is 242866352.

It is a junction number, because it is equal to n+sod(n) for n = 253668196 and 253668205.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6908 + ... + 23559.

It is an arithmetic number, because the mean of its divisors is an integer number (24953292).

Almost surely, 2^253668242 is an apocalyptic number.

253668242 is a deficient number, since it is larger than the sum of its proper divisors (145584430).

253668242 is a wasteful number, since it uses less digits than its factorization.

253668242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30673.

The product of its digits is 138240, while the sum is 38.

The square root of 253668242 is about 15926.9658755207. The cubic root of 253668242 is about 633.0267070350.

The spelling of 253668242 in words is "two hundred fifty-three million, six hundred sixty-eight thousand, two hundred forty-two".