31204103393 has 2 divisors, whose sum is σ = 31204103394. Its totient is φ = 31204103392.

The previous prime is 31204103377. The next prime is 31204103401. The reversal of 31204103393 is 39330140213.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 29974689424 + 1229413969 = 173132^2 + 35063^2 .

It is a cyclic number.

It is not a de Polignac number, because 31204103393 - 2⁴ = 31204103377 is a prime.

It is a super-2 number, since 2×31204103393² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (31204108393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15602051696 + 15602051697.

It is an arithmetic number, because the mean of its divisors is an integer number (15602051697).

Almost surely, 2^31204103393 is an apocalyptic number.

It is an amenable number.

31204103393 is a deficient number, since it is larger than the sum of its proper divisors (1).

31204103393 is an equidigital number, since it uses as much as digits as its factorization.

31204103393 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5832, while the sum is 29.

The spelling of 31204103393 in words is "thirty-one billion, two hundred four million, one hundred three thousand, three hundred ninety-three".