31222201332 has 48 divisors (see below), whose sum is σ = 85030686720. Its totient is φ = 8730827232.

The previous prime is 31222201321. The next prime is 31222201337. The reversal of 31222201332 is 23310222213.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 31222201299 and 31222201308.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31222201337) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3950232 + ... + 3958127.

It is an arithmetic number, because the mean of its divisors is an integer number (1771472640).

Almost surely, 2^31222201332 is an apocalyptic number.

It is an amenable number.

31222201332 is an abundant number, since it is smaller than the sum of its proper divisors (53808485388).

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

31222201332 is a wasteful number, since it uses less digits than its factorization.

31222201332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7908420 (or 7908418 counting only the distinct ones).

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

Adding to 31222201332 its reverse (23310222213), we get a palindrome (54532423545).

The spelling of 31222201332 in words is "thirty-one billion, two hundred twenty-two million, two hundred one thousand, three hundred thirty-two".