81414331 has 4 divisors (see below), whose sum is σ = 82253752. Its totient is φ = 80574912.

The previous prime is 81414329. The next prime is 81414341. The reversal of 81414331 is 13341418.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13341418 = 2 ⋅6670709.

It is a cyclic number.

It is not a de Polignac number, because 81414331 - 2¹ = 81414329 is a prime.

It is a super-2 number, since 2×81414331² = 13256586584355122, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 81414296 and 81414305.

It is not an unprimeable number, because it can be changed into a prime (81414301) 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, 419565 + ... + 419758.

It is an arithmetic number, because the mean of its divisors is an integer number (20563438).

Almost surely, 2^81414331 is an apocalyptic number.

81414331 is a deficient number, since it is larger than the sum of its proper divisors (839421).

81414331 is an equidigital number, since it uses as much as digits as its factorization.

81414331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 839420.

The product of its digits is 1152, while the sum is 25.

The square root of 81414331 is about 9022.9890280328. The cubic root of 81414331 is about 433.4113559050.

Adding to 81414331 its reverse (13341418), we get a palindrome (94755749).

The spelling of 81414331 in words is "eighty-one million, four hundred fourteen thousand, three hundred thirty-one".