31422533 has 2 divisors, whose sum is σ = 31422534. Its totient is φ = 31422532.

The previous prime is 31422497. The next prime is 31422557. The reversal of 31422533 is 33522413.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20775364 + 10647169 = 4558^2 + 3263^2 .

It is a cyclic number.

It is not a de Polignac number, because 31422533 - 2²⁰ = 30373957 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 31422499 and 31422508.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31422593) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15711266 + 15711267.

It is an arithmetic number, because the mean of its divisors is an integer number (15711267).

Almost surely, 2^31422533 is an apocalyptic number.

It is an amenable number.

31422533 is a deficient number, since it is larger than the sum of its proper divisors (1).

31422533 is an equidigital number, since it uses as much as digits as its factorization.

31422533 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2160, while the sum is 23.

The square root of 31422533 is about 5605.5805230145. The cubic root of 31422533 is about 315.5588734847.

Adding to 31422533 its reverse (33522413), we get a palindrome (64944946).

The spelling of 31422533 in words is "thirty-one million, four hundred twenty-two thousand, five hundred thirty-three".