1225314231 has 4 divisors (see below), whose sum is σ = 1633752312. Its totient is φ = 816876152.

The previous prime is 1225314217. The next prime is 1225314239. The reversal of 1225314231 is 1324135221.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1225314231 is a prime.

It is a super-2 number, since 2×1225314231² = 3002789929382242722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1225314239) 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, 204219036 + ... + 204219041.

It is an arithmetic number, because the mean of its divisors is an integer number (408438078).

Almost surely, 2^1225314231 is an apocalyptic number.

1225314231 is a deficient number, since it is larger than the sum of its proper divisors (408438081).

1225314231 is an equidigital number, since it uses as much as digits as its factorization.

1225314231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 408438080.

The product of its digits is 1440, while the sum is 24.

The square root of 1225314231 is about 35004.4887264476. The cubic root of 1225314231 is about 1070.0789620593.

Adding to 1225314231 its reverse (1324135221), we get a palindrome (2549449452).

The spelling of 1225314231 in words is "one billion, two hundred twenty-five million, three hundred fourteen thousand, two hundred thirty-one".