78313211 has 2 divisors, whose sum is σ = 78313212. Its totient is φ = 78313210.

The previous prime is 78313133. The next prime is 78313219. The reversal of 78313211 is 11231387.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 78313211 - 2¹⁰ = 78312187 is a prime.

It is a super-2 number, since 2×78313211² = 12265918034261042, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (78313219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39156605 + 39156606.

It is an arithmetic number, because the mean of its divisors is an integer number (39156606).

Almost surely, 2^78313211 is an apocalyptic number.

78313211 is a deficient number, since it is larger than the sum of its proper divisors (1).

78313211 is an equidigital number, since it uses as much as digits as its factorization.

78313211 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1008, while the sum is 26.

The square root of 78313211 is about 8849.4751821789. The cubic root of 78313211 is about 427.8370033976.

Adding to 78313211 its reverse (11231387), we get a palindrome (89544598).

The spelling of 78313211 in words is "seventy-eight million, three hundred thirteen thousand, two hundred eleven".