31423142213 has 2 divisors, whose sum is σ = 31423142214. Its totient is φ = 31423142212.

The previous prime is 31423142203. The next prime is 31423142237. The reversal of 31423142213 is 31224132413.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30116825764 + 1306316449 = 173542^2 + 36143^2 .

It is a cyclic number.

It is not a de Polignac number, because 31423142213 - 2⁴ = 31423142197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31423142203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15711571106 + 15711571107.

It is an arithmetic number, because the mean of its divisors is an integer number (15711571107).

Almost surely, 2^31423142213 is an apocalyptic number.

It is an amenable number.

31423142213 is a deficient number, since it is larger than the sum of its proper divisors (1).

31423142213 is an equidigital number, since it uses as much as digits as its factorization.

31423142213 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3456, while the sum is 26.

Adding to 31423142213 its reverse (31224132413), we get a palindrome (62647274626).

The spelling of 31423142213 in words is "thirty-one billion, four hundred twenty-three million, one hundred forty-two thousand, two hundred thirteen".