31523063212216 has 16 divisors (see below), whose sum is σ = 59106144358800. Its totient is φ = 15761424716544.

The previous prime is 31523063212183. The next prime is 31523063212243. The reversal of 31523063212216 is 61221236032513.

It is a congruent number.

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, 12100825 + ... + 14473288.

It is an arithmetic number, because the mean of its divisors is an integer number (3694134022425).

Almost surely, 2^{31523063212216} is an apocalyptic number.

It is an amenable number.

31523063212216 is a deficient number, since it is larger than the sum of its proper divisors (27583081146584).

31523063212216 is a wasteful number, since it uses less digits than its factorization.

31523063212216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26722398 (or 26722394 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 37.

Adding to 31523063212216 its reverse (61221236032513), we get a palindrome (92744299244729).

The spelling of 31523063212216 in words is "thirty-one trillion, five hundred twenty-three billion, sixty-three million, two hundred twelve thousand, two hundred sixteen".