31422022397 has 2 divisors, whose sum is σ = 31422022398. Its totient is φ = 31422022396.

The previous prime is 31422022393. The next prime is 31422022417. The reversal of 31422022397 is 79322022413.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 31152603001 + 269419396 = 176501^2 + 16414^2 .

It is a cyclic number.

It is not a de Polignac number, because 31422022397 - 2² = 31422022393 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31422022393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15711011198 + 15711011199.

It is an arithmetic number, because the mean of its divisors is an integer number (15711011199).

Almost surely, 2^31422022397 is an apocalyptic number.

It is an amenable number.

31422022397 is a deficient number, since it is larger than the sum of its proper divisors (1).

31422022397 is an equidigital number, since it uses as much as digits as its factorization.

31422022397 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36288, while the sum is 35.

The spelling of 31422022397 in words is "thirty-one billion, four hundred twenty-two million, twenty-two thousand, three hundred ninety-seven".