31140419 has 2 divisors, whose sum is σ = 31140420. Its totient is φ = 31140418.

The previous prime is 31140409. The next prime is 31140467. The reversal of 31140419 is 91404113.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31140419 is a prime.

It is a super-2 number, since 2×31140419² = 1939451390991122, which contains 22 as substring.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 31140394 and 31140403.

It is not a weakly prime, because it can be changed into another prime (31140409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15570209 + 15570210.

It is an arithmetic number, because the mean of its divisors is an integer number (15570210).

Almost surely, 2^31140419 is an apocalyptic number.

31140419 is a deficient number, since it is larger than the sum of its proper divisors (1).

31140419 is an equidigital number, since it uses as much as digits as its factorization.

31140419 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 31140419 is about 5580.3601138278. The cubic root of 31140419 is about 314.6116622043.

The spelling of 31140419 in words is "thirty-one million, one hundred forty thousand, four hundred nineteen".