253005431 has 4 divisors (see below), whose sum is σ = 289149072. Its totient is φ = 216861792.

The previous prime is 253005317. The next prime is 253005439. The reversal of 253005431 is 134500352.

253005431 = 3461² + 3462² + ... + 3481².

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

It is not a de Polignac number, because 253005431 - 2¹⁰ = 253004407 is a prime.

It is a super-2 number, since 2×253005431² = 128023496230991522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 253005397 and 253005406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (253005439) 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, 18071810 + ... + 18071823.

It is an arithmetic number, because the mean of its divisors is an integer number (72287268).

Almost surely, 2^253005431 is an apocalyptic number.

253005431 is a deficient number, since it is larger than the sum of its proper divisors (36143641).

253005431 is an equidigital number, since it uses as much as digits as its factorization.

253005431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36143640.

The product of its (nonzero) digits is 1800, while the sum is 23.

The square root of 253005431 is about 15906.1444416930. The cubic root of 253005431 is about 632.4748799306.

Adding to 253005431 its reverse (134500352), we get a palindrome (387505783).

The spelling of 253005431 in words is "two hundred fifty-three million, five thousand, four hundred thirty-one".