78322241 has 4 divisors (see below), whose sum is σ = 78384852. Its totient is φ = 78259632.

The previous prime is 78322219. The next prime is 78322249. The reversal of 78322241 is 14222387.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 14222387 = 17 ⋅836611.

It can be written as a sum of positive squares in 2 ways, for example, as 67240000 + 11082241 = 8200^2 + 3329^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78322241 is a prime.

It is a super-2 number, since 2×78322241² = 12268746870524162, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78322249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29390 + ... + 31943.

It is an arithmetic number, because the mean of its divisors is an integer number (19596213).

Almost surely, 2^78322241 is an apocalyptic number.

It is an amenable number.

78322241 is a deficient number, since it is larger than the sum of its proper divisors (62611).

78322241 is a wasteful number, since it uses less digits than its factorization.

78322241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62610.

The product of its digits is 5376, while the sum is 29.

The square root of 78322241 is about 8849.9853672195. The cubic root of 78322241 is about 427.8534468542.

The spelling of 78322241 in words is "seventy-eight million, three hundred twenty-two thousand, two hundred forty-one".