31201203016 has 16 divisors (see below), whose sum is σ = 58508653500. Its totient is φ = 15598895424.

The previous prime is 31201203013. The next prime is 31201203029. The reversal of 31201203016 is 61030210213.

It can be written as a sum of positive squares in 2 ways, for example, as 30474684900 + 726518116 = 174570^2 + 26954^2 .

It is a junction number, because it is equal to n+sod(n) for n = 31201202984 and 31201203002.

It is not an unprimeable number, because it can be changed into a prime (31201203013) 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 in 3 ways as a sum of consecutive naturals, for example, 133795 + ... + 283378.

Almost surely, 2^31201203016 is an apocalyptic number.

It is an amenable number.

31201203016 is a deficient number, since it is larger than the sum of its proper divisors (27307450484).

31201203016 is a wasteful number, since it uses less digits than its factorization.

31201203016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 426528 (or 426524 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 31201203016 its reverse (61030210213), we get a palindrome (92231413229).

The spelling of 31201203016 in words is "thirty-one billion, two hundred one million, two hundred three thousand, sixteen".