31961226 has 32 divisors (see below), whose sum is σ = 71057088. Its totient is φ = 9501440.

The previous prime is 31961213. The next prime is 31961227. The reversal of 31961226 is 62216913.

It is a junction number, because it is equal to n+sod(n) for n = 31961193 and 31961202.

It is not an unprimeable number, because it can be changed into a prime (31961227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1071 + ... + 8066.

It is an arithmetic number, because the mean of its divisors is an integer number (2220534).

Almost surely, 2^31961226 is an apocalyptic number.

31961226 is an abundant number, since it is smaller than the sum of its proper divisors (39095862).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31961226 is a wasteful number, since it uses less digits than its factorization.

31961226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9206.

The product of its digits is 3888, while the sum is 30.

The square root of 31961226 is about 5653.4260409065. The cubic root of 31961226 is about 317.3519296335.

The spelling of 31961226 in words is "thirty-one million, nine hundred sixty-one thousand, two hundred twenty-six".