31445215403106 has 64 divisors (see below), whose sum is σ = 65570544534528. Its totient is φ = 10044296353728.

The previous prime is 31445215403071. The next prime is 31445215403137. The reversal of 31445215403106 is 60130451254413.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 341352705 + ... + 341444811.

It is an arithmetic number, because the mean of its divisors is an integer number (1024539758352).

Almost surely, 2^{31445215403106} is an apocalyptic number.

31445215403106 is an abundant number, since it is smaller than the sum of its proper divisors (34125329131422).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31445215403106 is a wasteful number, since it uses less digits than its factorization.

31445215403106 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117175.

The product of its (nonzero) digits is 172800, while the sum is 39.

Adding to 31445215403106 its reverse (60130451254413), we get a palindrome (91575666657519).

The spelling of 31445215403106 in words is "thirty-one trillion, four hundred forty-five billion, two hundred fifteen million, four hundred three thousand, one hundred six".