1225253431 has 4 divisors (see below), whose sum is σ = 1225899864. Its totient is φ = 1224607000.

The previous prime is 1225253383. The next prime is 1225253441. The reversal of 1225253431 is 1343525221.

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

It is a cyclic number.

It is not a de Polignac number, because 1225253431 - 2⁷ = 1225253303 is a prime.

It is a super-2 number, since 2×1225253431² = 3002491940354543522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1225253431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1225253441) 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, 320365 + ... + 324166.

It is an arithmetic number, because the mean of its divisors is an integer number (306474966).

Almost surely, 2^1225253431 is an apocalyptic number.

1225253431 is a deficient number, since it is larger than the sum of its proper divisors (646433).

1225253431 is an equidigital number, since it uses as much as digits as its factorization.

1225253431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 646432.

The product of its digits is 7200, while the sum is 28.

The square root of 1225253431 is about 35003.6202556250. The cubic root of 1225253431 is about 1070.0612626874.

Adding to 1225253431 its reverse (1343525221), we get a palindrome (2568778652).

The spelling of 1225253431 in words is "one billion, two hundred twenty-five million, two hundred fifty-three thousand, four hundred thirty-one".