31522640243 has 2 divisors, whose sum is σ = 31522640244. Its totient is φ = 31522640242.

The previous prime is 31522640161. The next prime is 31522640273. The reversal of 31522640243 is 34204622513.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 31522640243 - 2⁸ = 31522639987 is a prime.

It is not a weakly prime, because it can be changed into another prime (31522640273) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15761320121 + 15761320122.

It is an arithmetic number, because the mean of its divisors is an integer number (15761320122).

Almost surely, 2^31522640243 is an apocalyptic number.

31522640243 is a deficient number, since it is larger than the sum of its proper divisors (1).

31522640243 is an equidigital number, since it uses as much as digits as its factorization.

31522640243 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 34560, while the sum is 32.

The spelling of 31522640243 in words is "thirty-one billion, five hundred twenty-two million, six hundred forty thousand, two hundred forty-three".