80421431 has 2 divisors, whose sum is σ = 80421432. Its totient is φ = 80421430.

The previous prime is 80421427. The next prime is 80421443. The reversal of 80421431 is 13412408.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 80421431 - 2² = 80421427 is a prime.

It is a super-2 number, since 2×80421431² = 12935213128175522, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 80421397 and 80421406.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (80421401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40210715 + 40210716.

It is an arithmetic number, because the mean of its divisors is an integer number (40210716).

Almost surely, 2^80421431 is an apocalyptic number.

80421431 is a deficient number, since it is larger than the sum of its proper divisors (1).

80421431 is an equidigital number, since it uses as much as digits as its factorization.

80421431 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 768, while the sum is 23.

The square root of 80421431 is about 8967.7996743906. The cubic root of 80421431 is about 431.6422345873.

Adding to 80421431 its reverse (13412408), we get a palindrome (93833839).

The spelling of 80421431 in words is "eighty million, four hundred twenty-one thousand, four hundred thirty-one".