31342422421 has 2 divisors, whose sum is σ = 31342422422. Its totient is φ = 31342422420.

The previous prime is 31342422409. The next prime is 31342422443. The reversal of 31342422421 is 12422424313.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25149519396 + 6192903025 = 158586^2 + 78695^2 .

It is a cyclic number.

It is not a de Polignac number, because 31342422421 - 2²³ = 31334033813 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31342422421.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31342425421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15671211210 + 15671211211.

It is an arithmetic number, because the mean of its divisors is an integer number (15671211211).

Almost surely, 2^31342422421 is an apocalyptic number.

It is an amenable number.

31342422421 is a deficient number, since it is larger than the sum of its proper divisors (1).

31342422421 is an equidigital number, since it uses as much as digits as its factorization.

31342422421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9216, while the sum is 28.

Adding to 31342422421 its reverse (12422424313), we get a palindrome (43764846734).

The spelling of 31342422421 in words is "thirty-one billion, three hundred forty-two million, four hundred twenty-two thousand, four hundred twenty-one".