78322211 has 12 divisors (see below), whose sum is σ = 87278856. Its totient is φ = 70218720.

The previous prime is 78322207. The next prime is 78322217. The reversal of 78322211 is 11222387.

It is not a de Polignac number, because 78322211 - 2² = 78322207 is a prime.

It is a super-2 number, since 2×78322211² = 12268737471857042, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78322217) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4400 + ... + 13266.

It is an arithmetic number, because the mean of its divisors is an integer number (7273238).

Almost surely, 2^78322211 is an apocalyptic number.

78322211 is a deficient number, since it is larger than the sum of its proper divisors (8956645).

78322211 is a wasteful number, since it uses less digits than its factorization.

78322211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8962 (or 8951 counting only the distinct ones).

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

The square root of 78322211 is about 8849.9836723013. The cubic root of 78322211 is about 427.8533922269.

Adding to 78322211 its reverse (11222387), we get a palindrome (89544598).

The spelling of 78322211 in words is "seventy-eight million, three hundred twenty-two thousand, two hundred eleven".