31212222330 has 16 divisors (see below), whose sum is σ = 74909333664. Its totient is φ = 8323259280.

The previous prime is 31212222323. The next prime is 31212222359. The reversal of 31212222330 is 3322221213.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 31212222297 and 31212222306.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 520203676 + ... + 520203735.

It is an arithmetic number, because the mean of its divisors is an integer number (4681833354).

Almost surely, 2^31212222330 is an apocalyptic number.

31212222330 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

31212222330 is an abundant number, since it is smaller than the sum of its proper divisors (43697111334).

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

31212222330 is a wasteful number, since it uses less digits than its factorization.

31212222330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1040407421.

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

Adding to 31212222330 its reverse (3322221213), we get a palindrome (34534443543).

The spelling of 31212222330 in words is "thirty-one billion, two hundred twelve million, two hundred twenty-two thousand, three hundred thirty".