80071531 has 2 divisors, whose sum is σ = 80071532. Its totient is φ = 80071530.

The previous prime is 80071507. The next prime is 80071553. The reversal of 80071531 is 13517008.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 80071531 - 2⁷ = 80071403 is a prime.

It is a super-2 number, since 2×80071531² = 12822900153367922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 80071496 and 80071505.

It is not a weakly prime, because it can be changed into another prime (80071561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40035765 + 40035766.

It is an arithmetic number, because the mean of its divisors is an integer number (40035766).

Almost surely, 2^80071531 is an apocalyptic number.

80071531 is a deficient number, since it is larger than the sum of its proper divisors (1).

80071531 is an equidigital number, since it uses as much as digits as its factorization.

80071531 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 840, while the sum is 25.

The square root of 80071531 is about 8948.2697210131. The cubic root of 80071531 is about 431.0153238056.

Adding to 80071531 its reverse (13517008), we get a palindrome (93588539).

The spelling of 80071531 in words is "eighty million, seventy-one thousand, five hundred thirty-one".