31222442 has 16 divisors (see below), whose sum is σ = 47803392. Its totient is φ = 15291360.

The previous prime is 31222439. The next prime is 31222447. The reversal of 31222442 is 24422213.

It is not an unprimeable number, because it can be changed into a prime (31222447) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20342 + ... + 21822.

It is an arithmetic number, because the mean of its divisors is an integer number (2987712).

Almost surely, 2^31222442 is an apocalyptic number.

31222442 is a deficient number, since it is larger than the sum of its proper divisors (16580950).

31222442 is a wasteful number, since it uses less digits than its factorization.

31222442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1693.

The product of its digits is 768, while the sum is 20.

The square root of 31222442 is about 5587.7045376433. The cubic root of 31222442 is about 314.8876461655.

Adding to 31222442 its reverse (24422213), we get a palindrome (55644655).

The spelling of 31222442 in words is "thirty-one million, two hundred twenty-two thousand, four hundred forty-two".