85415533213 has 4 divisors (see below), whose sum is σ = 85480886880. Its totient is φ = 85350179548.

The previous prime is 85415533187. The next prime is 85415533219. The reversal of 85415533213 is 31233551458.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 85415533213 - 2⁹ = 85415532701 is a prime.

It is a super-2 number, since 2×85415533213² (a number of 23 digits) 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 (85415533219) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32674873 + ... + 32677486.

It is an arithmetic number, because the mean of its divisors is an integer number (21370221720).

Almost surely, 2^85415533213 is an apocalyptic number.

It is an amenable number.

85415533213 is a deficient number, since it is larger than the sum of its proper divisors (65353667).

85415533213 is a wasteful number, since it uses less digits than its factorization.

85415533213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65353666.

The product of its digits is 216000, while the sum is 40.

The spelling of 85415533213 in words is "eighty-five billion, four hundred fifteen million, five hundred thirty-three thousand, two hundred thirteen".