31222342 has 4 divisors (see below), whose sum is σ = 46833516. Its totient is φ = 15611170.

The previous prime is 31222337. The next prime is 31222349. The reversal of 31222342 is 24322213.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31222349) 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 as a sum of consecutive naturals, namely, 7805584 + ... + 7805587.

It is an arithmetic number, because the mean of its divisors is an integer number (11708379).

Almost surely, 2^31222342 is an apocalyptic number.

31222342 is a deficient number, since it is larger than the sum of its proper divisors (15611174).

31222342 is a wasteful number, since it uses less digits than its factorization.

31222342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15611173.

The product of its digits is 576, while the sum is 19.

The square root of 31222342 is about 5587.6955894179. The cubic root of 31222342 is about 314.8873099885.

Adding to 31222342 its reverse (24322213), we get a palindrome (55544555).

The spelling of 31222342 in words is "thirty-one million, two hundred twenty-two thousand, three hundred forty-two".