86400031 has 2 divisors, whose sum is σ = 86400032. Its totient is φ = 86400030.

The previous prime is 86399993. The next prime is 86400047. The reversal of 86400031 is 13000468.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 86400031 - 2¹⁹ = 85875743 is a prime.

It is a super-2 number, since 2×86400031² = 14929930713601922, 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 = 86399975 and 86400011.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86400071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43200015 + 43200016.

It is an arithmetic number, because the mean of its divisors is an integer number (43200016).

Almost surely, 2^86400031 is an apocalyptic number.

86400031 is a deficient number, since it is larger than the sum of its proper divisors (1).

86400031 is an equidigital number, since it uses as much as digits as its factorization.

86400031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 86400031 is about 9295.1616984321. The cubic root of 86400031 is about 442.0838327095.

Adding to 86400031 its reverse (13000468), we get a palindrome (99400499).

The spelling of 86400031 in words is "eighty-six million, four hundred thousand, thirty-one".