31422424261 has 2 divisors, whose sum is σ = 31422424262. Its totient is φ = 31422424260.

The previous prime is 31422424213. The next prime is 31422424273. The reversal of 31422424261 is 16242422413.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26059644900 + 5362779361 = 161430^2 + 73231^2 .

It is a cyclic number.

It is not a de Polignac number, because 31422424261 - 2²⁵ = 31388869829 is a prime.

It is a super-2 number, since 2×31422424261² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31422422261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15711212130 + 15711212131.

It is an arithmetic number, because the mean of its divisors is an integer number (15711212131).

Almost surely, 2^31422424261 is an apocalyptic number.

It is an amenable number.

31422424261 is a deficient number, since it is larger than the sum of its proper divisors (1).

31422424261 is an equidigital number, since it uses as much as digits as its factorization.

31422424261 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18432, while the sum is 31.

Adding to 31422424261 its reverse (16242422413), we get a palindrome (47664846674).

The spelling of 31422424261 in words is "thirty-one billion, four hundred twenty-two million, four hundred twenty-four thousand, two hundred sixty-one".