80143581 has 16 divisors (see below), whose sum is σ = 122443904. Its totient is φ = 45676224.

The previous prime is 80143549. The next prime is 80143597. The reversal of 80143581 is 18534108.

It is not a de Polignac number, because 80143581 - 2⁵ = 80143549 is a prime.

It is a super-2 number, since 2×80143581² = 12845987151007122, 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 (80143541) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3531 + ... + 13143.

It is an arithmetic number, because the mean of its divisors is an integer number (7652744).

Almost surely, 2^80143581 is an apocalyptic number.

It is an amenable number.

80143581 is a deficient number, since it is larger than the sum of its proper divisors (42300323).

80143581 is a wasteful number, since it uses less digits than its factorization.

80143581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10020.

The product of its (nonzero) digits is 3840, while the sum is 30.

The square root of 80143581 is about 8952.2947337540. The cubic root of 80143581 is about 431.1445638481.

Adding to 80143581 its reverse (18534108), we get a palindrome (98677689).

The spelling of 80143581 in words is "eighty million, one hundred forty-three thousand, five hundred eighty-one".