31300400213 has 2 divisors, whose sum is σ = 31300400214. Its totient is φ = 31300400212.

The previous prime is 31300400189. The next prime is 31300400227. The reversal of 31300400213 is 31200400313.

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., 26392276849 + 4908123364 = 162457^2 + 70058^2 .

It is a cyclic number.

It is not a de Polignac number, because 31300400213 - 2⁸ = 31300399957 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31300400191 and 31300400200.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31300402213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15650200106 + 15650200107.

It is an arithmetic number, because the mean of its divisors is an integer number (15650200107).

Almost surely, 2^31300400213 is an apocalyptic number.

It is an amenable number.

31300400213 is a deficient number, since it is larger than the sum of its proper divisors (1).

31300400213 is an equidigital number, since it uses as much as digits as its factorization.

31300400213 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 17.

Adding to 31300400213 its reverse (31200400313), we get a palindrome (62500800526).

The spelling of 31300400213 in words is "thirty-one billion, three hundred million, four hundred thousand, two hundred thirteen".