85213021 has 8 divisors (see below), whose sum is σ = 87398784. Its totient is φ = 83042880.

The previous prime is 85213019. The next prime is 85213031. The reversal of 85213021 is 12031258.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 85213021 - 2¹ = 85213019 is a prime.

It is a super-2 number, since 2×85213021² = 14522517895892882, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 85212983 and 85213001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85213001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7566 + ... + 15088.

It is an arithmetic number, because the mean of its divisors is an integer number (10924848).

Almost surely, 2^85213021 is an apocalyptic number.

It is an amenable number.

85213021 is a deficient number, since it is larger than the sum of its proper divisors (2185763).

85213021 is a wasteful number, since it uses less digits than its factorization.

85213021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7811.

The product of its (nonzero) digits is 480, while the sum is 22.

The square root of 85213021 is about 9231.0899139809. The cubic root of 85213021 is about 440.0499616132.

Adding to 85213021 its reverse (12031258), we get a palindrome (97244279).

The spelling of 85213021 in words is "eighty-five million, two hundred thirteen thousand, twenty-one".