31019 has 2 divisors, whose sum is σ = 31020. Its totient is φ = 31018.

The previous prime is 31013. The next prime is 31033. The reversal of 31019 is 91013.

It is an a-pointer prime, because the next prime (31033) can be obtained adding 31019 to its sum of digits (14).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31019 - 2⁸ = 30763 is a prime.

It is a super-2 number, since 2×31019² = 1924356722, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 30994 and 31012.

It is not a weakly prime, because it can be changed into another prime (31013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15509 + 15510.

It is an arithmetic number, because the mean of its divisors is an integer number (15510).

2³¹⁰¹⁹ is an apocalyptic number.

31019 is a deficient number, since it is larger than the sum of its proper divisors (1).

31019 is an equidigital number, since it uses as much as digits as its factorization.

31019 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27, while the sum is 14.

The square root of 31019 is about 176.1221167259. The cubic root of 31019 is about 31.4202230876.

The spelling of 31019 in words is "thirty-one thousand, nineteen".