31223874 has 16 divisors (see below), whose sum is σ = 68124960. Its totient is φ = 9461760.

The previous prime is 31223873. The next prime is 31223879. The reversal of 31223874 is 47832213.

It is not an unprimeable number, because it can be changed into a prime (31223873) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 236479 + ... + 236610.

It is an arithmetic number, because the mean of its divisors is an integer number (4257810).

Almost surely, 2^31223874 is an apocalyptic number.

31223874 is an abundant number, since it is smaller than the sum of its proper divisors (36901086).

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

31223874 is a wasteful number, since it uses less digits than its factorization.

31223874 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 473105.

The product of its digits is 8064, while the sum is 30.

The square root of 31223874 is about 5587.8326746602. The cubic root of 31223874 is about 314.8924601411.

It can be divided in two parts, 3122 and 3874, that added together give a palindrome (6996).

The spelling of 31223874 in words is "thirty-one million, two hundred twenty-three thousand, eight hundred seventy-four".