80531863 has 4 divisors (see below), whose sum is σ = 80578960. Its totient is φ = 80484768.

The previous prime is 80531813. The next prime is 80531881. The reversal of 80531863 is 36813508.

It is a happy number.

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 80531863 - 2¹³ = 80523671 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80531813) 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, 20883 + ... + 24436.

It is an arithmetic number, because the mean of its divisors is an integer number (20144740).

Almost surely, 2^80531863 is an apocalyptic number.

80531863 is a deficient number, since it is larger than the sum of its proper divisors (47097).

80531863 is a wasteful number, since it uses less digits than its factorization.

80531863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47096.

The product of its (nonzero) digits is 17280, while the sum is 34.

The square root of 80531863 is about 8973.9547023595. The cubic root of 80531863 is about 431.8397164152.

The spelling of 80531863 in words is "eighty million, five hundred thirty-one thousand, eight hundred sixty-three".