31220210132 has 12 divisors (see below), whose sum is σ = 54636604596. Its totient is φ = 15609751680.

The previous prime is 31220210129. The next prime is 31220210149. The reversal of 31220210132 is 23101202213.

It can be written as a sum of positive squares in 2 ways, for example, as 6083376016 + 25136834116 = 77996^2 + 158546^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 31220210132.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 307532 + ... + 396252.

It is an arithmetic number, because the mean of its divisors is an integer number (4553050383).

Almost surely, 2^31220210132 is an apocalyptic number.

It is an amenable number.

31220210132 is a deficient number, since it is larger than the sum of its proper divisors (23416394464).

31220210132 is a wasteful number, since it uses less digits than its factorization.

31220210132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176698 (or 176696 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 31220210132 its reverse (23101202213), we get a palindrome (54321412345).

The spelling of 31220210132 in words is "thirty-one billion, two hundred twenty million, two hundred ten thousand, one hundred thirty-two".