85813321 has 6 divisors (see below), whose sum is σ = 94323866. Its totient is φ = 78012000.

The previous prime is 85813279. The next prime is 85813327. The reversal of 85813321 is 12331858.

It can be written as a sum of positive squares in only one way, i.e., 77633721 + 8179600 = 8811^2 + 2860^2 .

It is not a de Polignac number, because 85813321 - 2¹⁷ = 85682249 is a prime.

It is a super-2 number, since 2×85813321² = 14727852122098082, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85813327) 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, 354480 + ... + 354721.

Almost surely, 2^85813321 is an apocalyptic number.

It is an amenable number.

85813321 is a deficient number, since it is larger than the sum of its proper divisors (8510545).

85813321 is a wasteful number, since it uses less digits than its factorization.

85813321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 709223 (or 709212 counting only the distinct ones).

The product of its digits is 5760, while the sum is 31.

The square root of 85813321 is about 9263.5479704053. The cubic root of 85813321 is about 441.0808842407.

The spelling of 85813321 in words is "eighty-five million, eight hundred thirteen thousand, three hundred twenty-one".