8081431 has 4 divisors (see below), whose sum is σ = 8101600. Its totient is φ = 8061264.

The previous prime is 8081419. The next prime is 8081471. The reversal of 8081431 is 1341808.

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

It is a cyclic number.

It is not a de Polignac number, because 8081431 - 2⁵ = 8081399 is a prime.

It is a super-2 number, since 2×8081431² = 130619054015522, which contains 22 as substring.

It is a Duffinian number.

It is a nialpdrome in base 15.

It is a junction number, because it is equal to n+sod(n) for n = 8081396 and 8081405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8081471) 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, 9471 + ... + 10288.

It is an arithmetic number, because the mean of its divisors is an integer number (2025400).

Almost surely, 2^8081431 is an apocalyptic number.

8081431 is a deficient number, since it is larger than the sum of its proper divisors (20169).

8081431 is a wasteful number, since it uses less digits than its factorization.

8081431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20168.

The product of its (nonzero) digits is 768, while the sum is 25.

The square root of 8081431 is about 2842.7857815882. The cubic root of 8081431 is about 200.6763021658.

The spelling of 8081431 in words is "eight million, eighty-one thousand, four hundred thirty-one".