31031018243 has 2 divisors, whose sum is σ = 31031018244. Its totient is φ = 31031018242.

The previous prime is 31031018233. The next prime is 31031018251. The reversal of 31031018243 is 34281013013.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 31031018243 - 2²⁰ = 31029969667 is a prime.

It is not a weakly prime, because it can be changed into another prime (31031018233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15515509121 + 15515509122.

It is an arithmetic number, because the mean of its divisors is an integer number (15515509122).

Almost surely, 2^31031018243 is an apocalyptic number.

31031018243 is a deficient number, since it is larger than the sum of its proper divisors (1).

31031018243 is an equidigital number, since it uses as much as digits as its factorization.

31031018243 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 26.

The spelling of 31031018243 in words is "thirty-one billion, thirty-one million, eighteen thousand, two hundred forty-three".