78522223 has 4 divisors (see below), whose sum is σ = 84562408. Its totient is φ = 72482040.

The previous prime is 78522221. The next prime is 78522239. The reversal of 78522223 is 32222587.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 78522223 - 2¹ = 78522221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78522221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3020073 + ... + 3020098.

It is an arithmetic number, because the mean of its divisors is an integer number (21140602).

Almost surely, 2^78522223 is an apocalyptic number.

78522223 is a deficient number, since it is larger than the sum of its proper divisors (6040185).

78522223 is a wasteful number, since it uses less digits than its factorization.

78522223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6040184.

The product of its digits is 13440, while the sum is 31.

The square root of 78522223 is about 8861.2766010322. The cubic root of 78522223 is about 428.2172867491.

The spelling of 78522223 in words is "seventy-eight million, five hundred twenty-two thousand, two hundred twenty-three".