31423422257 has 2 divisors, whose sum is σ = 31423422258. Its totient is φ = 31423422256.

The previous prime is 31423422229. The next prime is 31423422263. The reversal of 31423422257 is 75222432413.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 29606020096 + 1817402161 = 172064^2 + 42631^2 .

It is a cyclic number.

It is not a de Polignac number, because 31423422257 - 2¹² = 31423418161 is a prime.

It is not a weakly prime, because it can be changed into another prime (31423422157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15711711128 + 15711711129.

It is an arithmetic number, because the mean of its divisors is an integer number (15711711129).

Almost surely, 2^31423422257 is an apocalyptic number.

It is an amenable number.

31423422257 is a deficient number, since it is larger than the sum of its proper divisors (1).

31423422257 is an equidigital number, since it uses as much as digits as its factorization.

31423422257 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 80640, while the sum is 35.

The spelling of 31423422257 in words is "thirty-one billion, four hundred twenty-three million, four hundred twenty-two thousand, two hundred fifty-seven".