1225437331 has 4 divisors (see below), whose sum is σ = 1228229200. Its totient is φ = 1222645464.

The previous prime is 1225437307. The next prime is 1225437341. The reversal of 1225437331 is 1337345221.

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 1225437331 - 2⁹ = 1225436819 is a prime.

It is a super-2 number, since 2×1225437331² = 3003393304416807122, 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 = 1225437293 and 1225437302.

It is not an unprimeable number, because it can be changed into a prime (1225437341) 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, 1395276 + ... + 1396153.

It is an arithmetic number, because the mean of its divisors is an integer number (307057300).

Almost surely, 2^1225437331 is an apocalyptic number.

1225437331 is a deficient number, since it is larger than the sum of its proper divisors (2791869).

1225437331 is an equidigital number, since it uses as much as digits as its factorization.

1225437331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2791868.

The product of its digits is 15120, while the sum is 31.

The square root of 1225437331 is about 35006.2470282091. The cubic root of 1225437331 is about 1070.1147956727.

The spelling of 1225437331 in words is "one billion, two hundred twenty-five million, four hundred thirty-seven thousand, three hundred thirty-one".