1253331313 has 4 divisors (see below), whose sum is σ = 1349741428. Its totient is φ = 1156921200.

The previous prime is 1253331301. The next prime is 1253331319. The reversal of 1253331313 is 3131333521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3131333521 = 1459 ⋅2146219.

It can be written as a sum of positive squares in 2 ways, for example, as 110418064 + 1142913249 = 10508^2 + 33807^2 .

It is a cyclic number.

It is not a de Polignac number, because 1253331313 - 2²¹ = 1251234161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1253331319) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48205038 + ... + 48205063.

It is an arithmetic number, because the mean of its divisors is an integer number (337435357).

Almost surely, 2^1253331313 is an apocalyptic number.

1253331313 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1253331313 is a deficient number, since it is larger than the sum of its proper divisors (96410115).

1253331313 is an equidigital number, since it uses as much as digits as its factorization.

1253331313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96410114.

The product of its digits is 2430, while the sum is 25.

The square root of 1253331313 is about 35402.4195924516. The cubic root of 1253331313 is about 1078.1734423412.

Adding to 1253331313 its reverse (3131333521), we get a palindrome (4384664834).

The spelling of 1253331313 in words is "one billion, two hundred fifty-three million, three hundred thirty-one thousand, three hundred thirteen".