31122523 has 2 divisors, whose sum is σ = 31122524. Its totient is φ = 31122522.

The previous prime is 31122521. The next prime is 31122557. The reversal of 31122523 is 32522113.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31122523 - 2¹ = 31122521 is a prime.

It is a super-2 number, since 2×31122523² = 1937222875771058, which contains 22 as substring.

Together with 31122521, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 31122523.

It is not a weakly prime, because it can be changed into another prime (31122521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15561261 + 15561262.

It is an arithmetic number, because the mean of its divisors is an integer number (15561262).

Almost surely, 2^31122523 is an apocalyptic number.

31122523 is a deficient number, since it is larger than the sum of its proper divisors (1).

31122523 is an equidigital number, since it uses as much as digits as its factorization.

31122523 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 360, while the sum is 19.

The square root of 31122523 is about 5578.7564026403. The cubic root of 31122523 is about 314.5513828912.

Adding to 31122523 its reverse (32522113), we get a palindrome (63644636).

The spelling of 31122523 in words is "thirty-one million, one hundred twenty-two thousand, five hundred twenty-three".