31947281203 has 2 divisors, whose sum is σ = 31947281204. Its totient is φ = 31947281202.

The previous prime is 31947281143. The next prime is 31947281209. The reversal of 31947281203 is 30218274913.

It is a strong prime.

It is an emirp because it is prime and its reverse (30218274913) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31947281203 - 2⁹ = 31947280691 is a prime.

It is not a weakly prime, because it can be changed into another prime (31947281209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15973640601 + 15973640602.

It is an arithmetic number, because the mean of its divisors is an integer number (15973640602).

Almost surely, 2^31947281203 is an apocalyptic number.

31947281203 is a deficient number, since it is larger than the sum of its proper divisors (1).

31947281203 is an equidigital number, since it uses as much as digits as its factorization.

31947281203 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72576, while the sum is 40.

The spelling of 31947281203 in words is "thirty-one billion, nine hundred forty-seven million, two hundred eighty-one thousand, two hundred three".