31422224 has 10 divisors (see below), whose sum is σ = 60880590. Its totient is φ = 15711104.

The previous prime is 31422203. The next prime is 31422227. The reversal of 31422224 is 42222413.

It can be written as a sum of positive squares in only one way, i.e., 20976400 + 10445824 = 4580^2 + 3232^2 .

It is a super-2 number, since 2×31422224² = 1974712322212352, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31422196 and 31422205.

It is not an unprimeable number, because it can be changed into a prime (31422227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 981929 + ... + 981960.

It is an arithmetic number, because the mean of its divisors is an integer number (6088059).

Almost surely, 2^31422224 is an apocalyptic number.

It is an amenable number.

31422224 is a deficient number, since it is larger than the sum of its proper divisors (29458366).

31422224 is a wasteful number, since it uses less digits than its factorization.

31422224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1963897 (or 1963891 counting only the distinct ones).

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

The square root of 31422224 is about 5605.5529611270. The cubic root of 31422224 is about 315.5578391100.

Adding to 31422224 its reverse (42222413), we get a palindrome (73644637).

The spelling of 31422224 in words is "thirty-one million, four hundred twenty-two thousand, two hundred twenty-four".