85148181 has 6 divisors (see below), whose sum is σ = 122991830. Its totient is φ = 56765448.

The previous prime is 85148179. The next prime is 85148183. The reversal of 85148181 is 18184158.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (85148179) and next prime (85148183).

It can be written as a sum of positive squares in only one way, i.e., 75168900 + 9979281 = 8670^2 + 3159^2 .

It is not a de Polignac number, because 85148181 - 2¹ = 85148179 is a prime.

It is a super-2 number, since 2×85148181² = 14500425455217522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85148183) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4730446 + ... + 4730463.

Almost surely, 2^85148181 is an apocalyptic number.

It is an amenable number.

85148181 is a deficient number, since it is larger than the sum of its proper divisors (37843649).

85148181 is a wasteful number, since it uses less digits than its factorization.

85148181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9460915 (or 9460912 counting only the distinct ones).

The product of its digits is 10240, while the sum is 36.

The square root of 85148181 is about 9227.5772009775. The cubic root of 85148181 is about 439.9383195219.

The spelling of 85148181 in words is "eighty-five million, one hundred forty-eight thousand, one hundred eighty-one".