31323221032 has 16 divisors (see below), whose sum is σ = 58734083700. Its totient is φ = 15660798720.

The previous prime is 31323221029. The next prime is 31323221053. The reversal of 31323221032 is 23012232313.

It can be written as a sum of positive squares in 2 ways, for example, as 27820238436 + 3502982596 = 166794^2 + 59186^2 .

It is a super-2 number, since 2×31323221032² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31323220994 and 31323221012.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 82032 + ... + 263392.

Almost surely, 2^31323221032 is an apocalyptic number.

It is an amenable number.

31323221032 is a deficient number, since it is larger than the sum of its proper divisors (27410862668).

31323221032 is a wasteful number, since it uses less digits than its factorization.

31323221032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202956 (or 202952 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 22.

Adding to 31323221032 its reverse (23012232313), we get a palindrome (54335453345).

The spelling of 31323221032 in words is "thirty-one billion, three hundred twenty-three million, two hundred twenty-one thousand, thirty-two".