80311031 has 4 divisors (see below), whose sum is σ = 80691864. Its totient is φ = 79930200.

The previous prime is 80311001. The next prime is 80311039. The reversal of 80311031 is 13011308.

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 80311031 - 2¹⁰ = 80310007 is a prime.

It is a super-2 number, since 2×80311031² = 12899723400565922, 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 (80311039) 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, 190100 + ... + 190521.

It is an arithmetic number, because the mean of its divisors is an integer number (20172966).

Almost surely, 2^80311031 is an apocalyptic number.

80311031 is a deficient number, since it is larger than the sum of its proper divisors (380833).

80311031 is a wasteful number, since it uses less digits than its factorization.

80311031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 380832.

The product of its (nonzero) digits is 72, while the sum is 17.

The square root of 80311031 is about 8961.6422044177. The cubic root of 80311031 is about 431.4446291961. Note that the first 3 decimals are identical.

Adding to 80311031 its reverse (13011308), we get a palindrome (93322339).

The spelling of 80311031 in words is "eighty million, three hundred eleven thousand, thirty-one".