85184421 has 16 divisors (see below), whose sum is σ = 130051200. Its totient is φ = 48584448.

The previous prime is 85184417. The next prime is 85184423. The reversal of 85184421 is 12448158.

It is not a de Polignac number, because 85184421 - 2² = 85184417 is a prime.

It is a super-2 number, since 2×85184421² = 14512771162210482, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85184423) 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, 8385 + ... + 15513.

It is an arithmetic number, because the mean of its divisors is an integer number (8128200).

Almost surely, 2^85184421 is an apocalyptic number.

It is an amenable number.

85184421 is a deficient number, since it is larger than the sum of its proper divisors (44866779).

85184421 is a wasteful number, since it uses less digits than its factorization.

85184421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7708.

The product of its digits is 10240, while the sum is 33.

The square root of 85184421 is about 9229.5406711277. The cubic root of 85184421 is about 440.0007248611. Note that the first 3 decimals are identical.

The spelling of 85184421 in words is "eighty-five million, one hundred eighty-four thousand, four hundred twenty-one".