76578231 has 4 divisors (see below), whose sum is σ = 102104312. Its totient is φ = 51052152.

The previous prime is 76578221. The next prime is 76578233. The reversal of 76578231 is 13287567.

76578231 is nontrivially palindromic in base 15.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 76578231 - 2⁶ = 76578167 is a prime.

It is a super-2 number, since 2×76578231² = 11728450926178722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 76578231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (76578233) 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, 12763036 + ... + 12763041.

It is an arithmetic number, because the mean of its divisors is an integer number (25526078).

Almost surely, 2^76578231 is an apocalyptic number.

76578231 is a deficient number, since it is larger than the sum of its proper divisors (25526081).

76578231 is a wasteful number, since it uses less digits than its factorization.

76578231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25526080.

The product of its digits is 70560, while the sum is 39.

The square root of 76578231 is about 8750.8988681163. The cubic root of 76578231 is about 424.6538930735.

The spelling of 76578231 in words is "seventy-six million, five hundred seventy-eight thousand, two hundred thirty-one".