78141231 has 48 divisors (see below), whose sum is σ = 139464000. Its totient is φ = 41997312.

The previous prime is 78141227. The next prime is 78141233. The reversal of 78141231 is 13214187.

It is not a de Polignac number, because 78141231 - 2² = 78141227 is a prime.

It is a super-2 number, since 2×78141231² = 12212103964390722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 78141195 and 78141204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78141233) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 51735 + ... + 53223.

It is an arithmetic number, because the mean of its divisors is an integer number (2905500).

Almost surely, 2^78141231 is an apocalyptic number.

78141231 is a deficient number, since it is larger than the sum of its proper divisors (61322769).

78141231 is a wasteful number, since it uses less digits than its factorization.

78141231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1533 (or 1516 counting only the distinct ones).

The product of its digits is 1344, while the sum is 27.

The square root of 78141231 is about 8839.7528811613. The cubic root of 78141231 is about 427.5235895468.

It can be divided in two parts, 7814 and 1231, that added together give a triangular number (9045 = T₁₃₄).

The spelling of 78141231 in words is "seventy-eight million, one hundred forty-one thousand, two hundred thirty-one".