42320431213 has 2 divisors, whose sum is σ = 42320431214. Its totient is φ = 42320431212.

The previous prime is 42320431157. The next prime is 42320431267. The reversal of 42320431213 is 31213402324.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 42231072004 + 89359209 = 205502^2 + 9453^2 .

It is a cyclic number.

It is not a de Polignac number, because 42320431213 - 2¹³ = 42320423021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (82320431213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21160215606 + 21160215607.

It is an arithmetic number, because the mean of its divisors is an integer number (21160215607).

Almost surely, 2^42320431213 is an apocalyptic number.

It is an amenable number.

42320431213 is a deficient number, since it is larger than the sum of its proper divisors (1).

42320431213 is an equidigital number, since it uses as much as digits as its factorization.

42320431213 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456, while the sum is 25.

Adding to 42320431213 its reverse (31213402324), we get a palindrome (73533833537).

The spelling of 42320431213 in words is "forty-two billion, three hundred twenty million, four hundred thirty-one thousand, two hundred thirteen".