85155001 has 2 divisors, whose sum is σ = 85155002. Its totient is φ = 85155000.

The previous prime is 85154999. The next prime is 85155029. The reversal of 85155001 is 10055158.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 83997225 + 1157776 = 9165^2 + 1076^2 .

It is a cyclic number.

It is not a de Polignac number, because 85155001 - 2¹ = 85154999 is a prime.

Together with 85154999, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (85155041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42577500 + 42577501.

It is an arithmetic number, because the mean of its divisors is an integer number (42577501).

Almost surely, 2^85155001 is an apocalyptic number.

It is an amenable number.

85155001 is a deficient number, since it is larger than the sum of its proper divisors (1).

85155001 is an equidigital number, since it uses as much as digits as its factorization.

85155001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1000, while the sum is 25.

The square root of 85155001 is about 9227.9467380344. The cubic root of 85155001 is about 439.9500649254.

The spelling of 85155001 in words is "eighty-five million, one hundred fifty-five thousand, one".