31103242393 has 2 divisors, whose sum is σ = 31103242394. Its totient is φ = 31103242392.

The previous prime is 31103242301. The next prime is 31103242409. The reversal of 31103242393 is 39324230113.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30895795984 + 207446409 = 175772^2 + 14403^2 .

It is a cyclic number.

It is not a de Polignac number, because 31103242393 - 2²⁹ = 30566371481 is a prime.

It is not a weakly prime, because it can be changed into another prime (31103282393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15551621196 + 15551621197.

It is an arithmetic number, because the mean of its divisors is an integer number (15551621197).

Almost surely, 2^31103242393 is an apocalyptic number.

It is an amenable number.

31103242393 is a deficient number, since it is larger than the sum of its proper divisors (1).

31103242393 is an equidigital number, since it uses as much as digits as its factorization.

31103242393 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11664, while the sum is 31.

The spelling of 31103242393 in words is "thirty-one billion, one hundred three million, two hundred forty-two thousand, three hundred ninety-three".