85181415 has 16 divisors (see below), whose sum is σ = 148680576. Its totient is φ = 41300000.

The previous prime is 85181413. The next prime is 85181417. The reversal of 85181415 is 51418158.

It is an interprime number because it is at equal distance from previous prime (85181413) and next prime (85181417).

It is not a de Polignac number, because 85181415 - 2¹ = 85181413 is a prime.

It is a super-2 number, since 2×85181415² = 14511746922804450, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85181413) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 257961 + ... + 258290.

It is an arithmetic number, because the mean of its divisors is an integer number (9292536).

Almost surely, 2^85181415 is an apocalyptic number.

85181415 is a deficient number, since it is larger than the sum of its proper divisors (63499161).

85181415 is a wasteful number, since it uses less digits than its factorization.

85181415 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 516270.

The product of its digits is 6400, while the sum is 33.

The square root of 85181415 is about 9229.3778230171. The cubic root of 85181415 is about 439.9955491974.

The spelling of 85181415 in words is "eighty-five million, one hundred eighty-one thousand, four hundred fifteen".