78547231 has 16 divisors (see below), whose sum is σ = 95270400. Its totient is φ = 63299808.

The previous prime is 78547201. The next prime is 78547237. The reversal of 78547231 is 13274587.

It is a cyclic number.

It is not a de Polignac number, because 78547231 - 2⁹ = 78546719 is a prime.

It is a super-2 number, since 2×78547231² = 12339334995534722, 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 (78547237) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5365 + ... + 13633.

It is an arithmetic number, because the mean of its divisors is an integer number (5954400).

Almost surely, 2^78547231 is an apocalyptic number.

78547231 is a deficient number, since it is larger than the sum of its proper divisors (16723169).

78547231 is a wasteful number, since it uses less digits than its factorization.

78547231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8358.

The product of its digits is 47040, while the sum is 37.

The square root of 78547231 is about 8862.6875720630. The cubic root of 78547231 is about 428.2627419118.

The spelling of 78547231 in words is "seventy-eight million, five hundred forty-seven thousand, two hundred thirty-one".