80215631 has 6 divisors (see below), whose sum is σ = 82887696. Its totient is φ = 77627100.

The previous prime is 80215621. The next prime is 80215637. The reversal of 80215631 is 13651208.

It is not a de Polignac number, because 80215631 - 2⁶ = 80215567 is a prime.

It is a super-2 number, since 2×80215631² = 12869094913456322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 80215631.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80215637) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 40775 + ... + 42696.

It is an arithmetic number, because the mean of its divisors is an integer number (13814616).

Almost surely, 2^80215631 is an apocalyptic number.

80215631 is a deficient number, since it is larger than the sum of its proper divisors (2672065).

80215631 is an equidigital number, since it uses as much as digits as its factorization.

80215631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83533 (or 83502 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 26.

The square root of 80215631 is about 8956.3179376349. The cubic root of 80215631 is about 431.2737264549.

Adding to 80215631 its reverse (13651208), we get a palindrome (93866839).

The spelling of 80215631 in words is "eighty million, two hundred fifteen thousand, six hundred thirty-one".