253384618 has 4 divisors (see below), whose sum is σ = 380076930. Its totient is φ = 126692308.

The previous prime is 253384613. The next prime is 253384657. The reversal of 253384618 is 816483352.

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

It can be written as a sum of positive squares in only one way, i.e., 233998209 + 19386409 = 15297^2 + 4403^2 .

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (253384613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63346153 + ... + 63346156.

Almost surely, 2^253384618 is an apocalyptic number.

253384618 is a deficient number, since it is larger than the sum of its proper divisors (126692312).

253384618 is a wasteful number, since it uses less digits than its factorization.

253384618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126692311.

The product of its digits is 138240, while the sum is 40.

The square root of 253384618 is about 15918.0594922874. The cubic root of 253384618 is about 632.7906920449.

The spelling of 253384618 in words is "two hundred fifty-three million, three hundred eighty-four thousand, six hundred eighteen".