253145433 has 4 divisors (see below), whose sum is σ = 337527248. Its totient is φ = 168763620.

The previous prime is 253145423. The next prime is 253145441. The reversal of 253145433 is 334541352.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 253145433 - 2⁵ = 253145401 is a prime.

It is a super-2 number, since 2×253145433² = 128165220497514978, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 253145433.

It is not an unprimeable number, because it can be changed into a prime (253145423) 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, 42190903 + ... + 42190908.

It is an arithmetic number, because the mean of its divisors is an integer number (84381812).

Almost surely, 2^253145433 is an apocalyptic number.

It is an amenable number.

253145433 is a deficient number, since it is larger than the sum of its proper divisors (84381815).

253145433 is an equidigital number, since it uses as much as digits as its factorization.

253145433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84381814.

The product of its digits is 21600, while the sum is 30.

The square root of 253145433 is about 15910.5447109771. The cubic root of 253145433 is about 632.5915196143.

Adding to 253145433 its reverse (334541352), we get a palindrome (587686785).

The spelling of 253145433 in words is "two hundred fifty-three million, one hundred forty-five thousand, four hundred thirty-three".