85531151 has 2 divisors, whose sum is σ = 85531152. Its totient is φ = 85531150.

The previous prime is 85531109. The next prime is 85531189. The reversal of 85531151 is 15113558.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 85531151 - 2²² = 81336847 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85531051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42765575 + 42765576.

It is an arithmetic number, because the mean of its divisors is an integer number (42765576).

Almost surely, 2^85531151 is an apocalyptic number.

85531151 is a deficient number, since it is larger than the sum of its proper divisors (1).

85531151 is an equidigital number, since it uses as much as digits as its factorization.

85531151 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3000, while the sum is 29.

The square root of 85531151 is about 9248.3053042166. The cubic root of 85531151 is about 440.5969016571.

The spelling of 85531151 in words is "eighty-five million, five hundred thirty-one thousand, one hundred fifty-one".