78522263 has 4 divisors (see below), whose sum is σ = 78626208. Its totient is φ = 78418320.

The previous prime is 78522259. The next prime is 78522281. The reversal of 78522263 is 36222587.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 36222587 = 197 ⋅183871.

It is a cyclic number.

It is not a de Polignac number, because 78522263 - 2² = 78522259 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 (78522293) 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, 50831 + ... + 52352.

It is an arithmetic number, because the mean of its divisors is an integer number (19656552).

Almost surely, 2^78522263 is an apocalyptic number.

78522263 is a deficient number, since it is larger than the sum of its proper divisors (103945).

78522263 is a wasteful number, since it uses less digits than its factorization.

78522263 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103944.

The product of its digits is 40320, while the sum is 35.

The square root of 78522263 is about 8861.2788580430. The cubic root of 78522263 is about 428.2173594618.

The spelling of 78522263 in words is "seventy-eight million, five hundred twenty-two thousand, two hundred sixty-three".