31020211232 has 12 divisors (see below), whose sum is σ = 61071040926. Its totient is φ = 15510105600.

The previous prime is 31020211231. The next prime is 31020211237. The reversal of 31020211232 is 23211202013.

It can be written as a sum of positive squares in only one way, i.e., 25091827216 + 5928384016 = 158404^2 + 76996^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 31020211232.

It is not an unprimeable number, because it can be changed into a prime (31020211231) 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, 484690769 + ... + 484690832.

Almost surely, 2^31020211232 is an apocalyptic number.

31020211232 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

31020211232 is a deficient number, since it is larger than the sum of its proper divisors (30050829694).

31020211232 is an equidigital number, since it uses as much as digits as its factorization.

31020211232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 969381611 (or 969381603 counting only the distinct ones).

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

Adding to 31020211232 its reverse (23211202013), we get a palindrome (54231413245).

The spelling of 31020211232 in words is "thirty-one billion, twenty million, two hundred eleven thousand, two hundred thirty-two".