31423221242 has 16 divisors (see below), whose sum is σ = 54211493760. Its totient is φ = 13381316208.

The previous prime is 31423221239. The next prime is 31423221257. The reversal of 31423221242 is 24212232413.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7145942 + ... + 7150337.

It is an arithmetic number, because the mean of its divisors is an integer number (3388218360).

Almost surely, 2^31423221242 is an apocalyptic number.

31423221242 is a deficient number, since it is larger than the sum of its proper divisors (22788272518).

31423221242 is a wasteful number, since it uses less digits than its factorization.

31423221242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14296445.

The product of its digits is 4608, while the sum is 26.

Adding to 31423221242 its reverse (24212232413), we get a palindrome (55635453655).

The spelling of 31423221242 in words is "thirty-one billion, four hundred twenty-three million, two hundred twenty-one thousand, two hundred forty-two".