1225456331 has 24 divisors (see below), whose sum is σ = 1378788672. Its totient is φ = 1079892000.

The previous prime is 1225456313. The next prime is 1225456343. The reversal of 1225456331 is 1336545221.

It is a happy number.

It is not a de Polignac number, because 1225456331 - 2¹⁴ = 1225439947 is a prime.

It is a super-2 number, since 2×1225456331² = 3003486438375963122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1225456361) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7518056 + ... + 7518218.

It is an arithmetic number, because the mean of its divisors is an integer number (57449528).

Almost surely, 2^1225456331 is an apocalyptic number.

1225456331 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1225456331 is a deficient number, since it is larger than the sum of its proper divisors (153332341).

1225456331 is a wasteful number, since it uses less digits than its factorization.

1225456331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 443 (or 342 counting only the distinct ones).

The product of its digits is 21600, while the sum is 32.

The square root of 1225456331 is about 35006.5184072909. The cubic root of 1225456331 is about 1070.1203262359.

The spelling of 1225456331 in words is "one billion, two hundred twenty-five million, four hundred fifty-six thousand, three hundred thirty-one".