253315493 has 8 divisors (see below), whose sum is σ = 266348280. Its totient is φ = 240569280.

The previous prime is 253315483. The next prime is 253315499. The reversal of 253315493 is 394513352.

253315493 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 17447329 + 235868164 = 4177^2 + 15358^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 253315493 - 2¹⁸ = 253053349 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (253315499) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 69830 + ... + 73367.

It is an arithmetic number, because the mean of its divisors is an integer number (33293535).

Almost surely, 2^253315493 is an apocalyptic number.

It is an amenable number.

253315493 is a deficient number, since it is larger than the sum of its proper divisors (13032787).

253315493 is a wasteful number, since it uses less digits than its factorization.

253315493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143287.

The product of its digits is 48600, while the sum is 35.

The square root of 253315493 is about 15915.8880682166. Note that the first 3 decimals coincide. The cubic root of 253315493 is about 632.7331436491.

The spelling of 253315493 in words is "two hundred fifty-three million, three hundred fifteen thousand, four hundred ninety-three".