31042221330 has 16 divisors (see below), whose sum is σ = 74501331264. Its totient is φ = 8277925680.

The previous prime is 31042221319. The next prime is 31042221341. The reversal of 31042221330 is 3312224013.

It is an interprime number because it is at equal distance from previous prime (31042221319) and next prime (31042221341).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 31042221297 and 31042221306.

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, 517370326 + ... + 517370385.

It is an arithmetic number, because the mean of its divisors is an integer number (4656333204).

Almost surely, 2^31042221330 is an apocalyptic number.

31042221330 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

31042221330 is an abundant number, since it is smaller than the sum of its proper divisors (43459109934).

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

31042221330 is a wasteful number, since it uses less digits than its factorization.

31042221330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1034740721.

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 31042221330 its reverse (3312224013), we get a palindrome (34354445343).

The spelling of 31042221330 in words is "thirty-one billion, forty-two million, two hundred twenty-one thousand, three hundred thirty".