74218031 has 2 divisors, whose sum is σ = 74218032. Its totient is φ = 74218030.

The previous prime is 74218007. The next prime is 74218037. The reversal of 74218031 is 13081247.

It is a strong prime.

It is an emirp because it is prime and its reverse (13081247) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-74218031 is a prime.

It is a super-2 number, since 2×74218031² = 11016632251033922, 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 (74218037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37109015 + 37109016.

It is an arithmetic number, because the mean of its divisors is an integer number (37109016).

Almost surely, 2^74218031 is an apocalyptic number.

74218031 is a deficient number, since it is larger than the sum of its proper divisors (1).

74218031 is an equidigital number, since it uses as much as digits as its factorization.

74218031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1344, while the sum is 26.

The square root of 74218031 is about 8614.9887405614. The cubic root of 74218031 is about 420.2455687871.

Adding to 74218031 its reverse (13081247), we get a palindrome (87299278).

The spelling of 74218031 in words is "seventy-four million, two hundred eighteen thousand, thirty-one".