31342319 has 2 divisors, whose sum is σ = 31342320. Its totient is φ = 31342318.

The previous prime is 31342277. The next prime is 31342351. The reversal of 31342319 is 91324313.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (91324313) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31342319 - 2¹⁶ = 31276783 is a prime.

It is a super-2 number, since 2×31342319² = 1964681920595522, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31342369) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15671159 + 15671160.

It is an arithmetic number, because the mean of its divisors is an integer number (15671160).

Almost surely, 2^31342319 is an apocalyptic number.

31342319 is a deficient number, since it is larger than the sum of its proper divisors (1).

31342319 is an equidigital number, since it uses as much as digits as its factorization.

31342319 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1944, while the sum is 26.

The square root of 31342319 is about 5598.4211167078. The cubic root of 31342319 is about 315.2901299398.

The spelling of 31342319 in words is "thirty-one million, three hundred forty-two thousand, three hundred nineteen".