31000402222 has 16 divisors (see below), whose sum is σ = 47495407680. Its totient is φ = 15168675168.

The previous prime is 31000402117. The next prime is 31000402229. The reversal of 31000402222 is 22220400013.

It is a super-2 number, since 2×31000402222² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31000402196 and 31000402205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31000402229) by changing a digit.

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, 1284208 + ... + 1308124.

It is an arithmetic number, because the mean of its divisors is an integer number (2968462980).

Almost surely, 2^31000402222 is an apocalyptic number.

31000402222 is a deficient number, since it is larger than the sum of its proper divisors (16495005458).

31000402222 is a wasteful number, since it uses less digits than its factorization.

31000402222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37755.

The product of its (nonzero) digits is 192, while the sum is 16.

Adding to 31000402222 its reverse (22220400013), we get a palindrome (53220802235).

The spelling of 31000402222 in words is "thirty-one billion, four hundred two thousand, two hundred twenty-two".