31020201232 has 10 divisors (see below), whose sum is σ = 60101639918. Its totient is φ = 15510100608.

The previous prime is 31020201227. The next prime is 31020201239. The reversal of 31020201232 is 23210202013.

It can be written as a sum of positive squares in only one way, i.e., 30138348816 + 881852416 = 173604^2 + 29696^2 .

It is a Harshad number since it is a multiple of its sum of digits (16), and also a Moran number because the ratio is a prime number: 1938762577 = 31020201232 / (3 + 1 + 0 + 2 + 0 + 2 + 0 + 1 + 2 + 3 + 2).

It is not an unprimeable number, because it can be changed into a prime (31020201239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 969381273 + ... + 969381304.

Almost surely, 2^31020201232 is an apocalyptic number.

It is an amenable number.

31020201232 is a deficient number, since it is larger than the sum of its proper divisors (29081438686).

31020201232 is a wasteful number, since it uses less digits than its factorization.

31020201232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1938762585 (or 1938762579 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 31020201232 its reverse (23210202013), we get a palindrome (54230403245).

The spelling of 31020201232 in words is "thirty-one billion, twenty million, two hundred one thousand, two hundred thirty-two".