78225599 has 8 divisors (see below), whose sum is σ = 82778112. Its totient is φ = 73769080.

The previous prime is 78225569. The next prime is 78225601. The reversal of 78225599 is 99552287.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78225599 is a prime.

It is a super-2 number, since 2×78225599² = 12238488677817602, 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 (78225569) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22319 + ... + 25584.

It is an arithmetic number, because the mean of its divisors is an integer number (10347264).

Almost surely, 2^78225599 is an apocalyptic number.

78225599 is a deficient number, since it is larger than the sum of its proper divisors (4552513).

78225599 is a wasteful number, since it uses less digits than its factorization.

78225599 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47997.

The product of its digits is 453600, while the sum is 47.

The square root of 78225599 is about 8844.5236728724. The cubic root of 78225599 is about 427.6773979624.

The spelling of 78225599 in words is "seventy-eight million, two hundred twenty-five thousand, five hundred ninety-nine".