78222503 has 4 divisors (see below), whose sum is σ = 78489768. Its totient is φ = 77955240.

The previous prime is 78222499. The next prime is 78222509. The reversal of 78222503 is 30522287.

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 78222503 - 2² = 78222499 is a prime.

It is a super-2 number, since 2×78222503² = 12237519951170018, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78222509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 133193 + ... + 133778.

It is an arithmetic number, because the mean of its divisors is an integer number (19622442).

Almost surely, 2^78222503 is an apocalyptic number.

78222503 is a deficient number, since it is larger than the sum of its proper divisors (267265).

78222503 is a wasteful number, since it uses less digits than its factorization.

78222503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 267264.

The product of its (nonzero) digits is 6720, while the sum is 29.

The square root of 78222503 is about 8844.3486475828. The cubic root of 78222503 is about 427.6717557059.

The spelling of 78222503 in words is "seventy-eight million, two hundred twenty-two thousand, five hundred three".