253111345 has 4 divisors (see below), whose sum is σ = 303733620. Its totient is φ = 202489072.

The previous prime is 253111337. The next prime is 253111349. The reversal of 253111345 is 543111352.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 128051856 + 125059489 = 11316^2 + 11183^2 .

It is a cyclic number.

It is not a de Polignac number, because 253111345 - 2³ = 253111337 is a prime.

It is not an unprimeable number, because it can be changed into a prime (253111349) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25311130 + ... + 25311139.

It is an arithmetic number, because the mean of its divisors is an integer number (75933405).

Almost surely, 2^253111345 is an apocalyptic number.

It is an amenable number.

253111345 is a deficient number, since it is larger than the sum of its proper divisors (50622275).

253111345 is an equidigital number, since it uses as much as digits as its factorization.

253111345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50622274.

The product of its digits is 1800, while the sum is 25.

The square root of 253111345 is about 15909.4734356609. The cubic root of 253111345 is about 632.5631238848.

Adding to 253111345 its reverse (543111352), we get a palindrome (796222697).

The spelling of 253111345 in words is "two hundred fifty-three million, one hundred eleven thousand, three hundred forty-five".