12225431 has 4 divisors (see below), whose sum is σ = 12944592. Its totient is φ = 11506272.

The previous prime is 12225427. The next prime is 12225461. The reversal of 12225431 is 13452221.

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 12225431 - 2² = 12225427 is a prime.

It is a super-2 number, since 2×12225431² = 298922326271522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12225461) 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, 359555 + ... + 359588.

It is an arithmetic number, because the mean of its divisors is an integer number (3236148).

Almost surely, 2^12225431 is an apocalyptic number.

12225431 is a deficient number, since it is larger than the sum of its proper divisors (719161).

12225431 is an equidigital number, since it uses as much as digits as its factorization.

12225431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 719160.

The product of its digits is 480, while the sum is 20.

The square root of 12225431 is about 3496.4883812191. The cubic root of 12225431 is about 230.3675974297.

Adding to 12225431 its reverse (13452221), we get a palindrome (25677652).

The spelling of 12225431 in words is "twelve million, two hundred twenty-five thousand, four hundred thirty-one".