31240545223 has 2 divisors, whose sum is σ = 31240545224. Its totient is φ = 31240545222.

The previous prime is 31240545221. The next prime is 31240545239. The reversal of 31240545223 is 32254504213.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31240545223 - 2¹ = 31240545221 is a prime.

Together with 31240545221, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31240545221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15620272611 + 15620272612.

It is an arithmetic number, because the mean of its divisors is an integer number (15620272612).

Almost surely, 2^31240545223 is an apocalyptic number.

31240545223 is a deficient number, since it is larger than the sum of its proper divisors (1).

31240545223 is an equidigital number, since it uses as much as digits as its factorization.

31240545223 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 28800, while the sum is 31.

The spelling of 31240545223 in words is "thirty-one billion, two hundred forty million, five hundred forty-five thousand, two hundred twenty-three".