31206028493 has 2 divisors, whose sum is σ = 31206028494. Its totient is φ = 31206028492.

The previous prime is 31206028487. The next prime is 31206028519. The reversal of 31206028493 is 39482060213.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25544669929 + 5661358564 = 159827^2 + 75242^2 .

It is a cyclic number.

It is not a de Polignac number, because 31206028493 - 2¹² = 31206024397 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31206021493) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15603014246 + 15603014247.

It is an arithmetic number, because the mean of its divisors is an integer number (15603014247).

Almost surely, 2^31206028493 is an apocalyptic number.

It is an amenable number.

31206028493 is a deficient number, since it is larger than the sum of its proper divisors (1).

31206028493 is an equidigital number, since it uses as much as digits as its factorization.

31206028493 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 62208, while the sum is 38.

The spelling of 31206028493 in words is "thirty-one billion, two hundred six million, twenty-eight thousand, four hundred ninety-three".