85531159447 has 2 divisors, whose sum is σ = 85531159448. Its totient is φ = 85531159446.

The previous prime is 85531159391. The next prime is 85531159453. The reversal of 85531159447 is 74495113558.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85531159447 is a prime.

It is a super-3 number, since 3×85531159447³ (a number of 34 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 85531159394 and 85531159403.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85531159457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42765579723 + 42765579724.

It is an arithmetic number, because the mean of its divisors is an integer number (42765579724).

Almost surely, 2^85531159447 is an apocalyptic number.

85531159447 is a deficient number, since it is larger than the sum of its proper divisors (1).

85531159447 is an equidigital number, since it uses as much as digits as its factorization.

85531159447 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3024000, while the sum is 52.

The spelling of 85531159447 in words is "eighty-five billion, five hundred thirty-one million, one hundred fifty-nine thousand, four hundred forty-seven".