85238521212 has 72 divisors (see below), whose sum is σ = 215449340400. Its totient is φ = 26217085440.

The previous prime is 85238521211. The next prime is 85238521267. The reversal of 85238521212 is 21212583258.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85238521211) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6525664 + ... + 6538712.

It is an arithmetic number, because the mean of its divisors is an integer number (2992351950).

Almost surely, 2^85238521212 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 85238521212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (107724670200).

85238521212 is an abundant number, since it is smaller than the sum of its proper divisors (130210819188).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

85238521212 is a wasteful number, since it uses less digits than its factorization.

85238521212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16303 (or 16288 counting only the distinct ones).

The product of its digits is 76800, while the sum is 39.

The spelling of 85238521212 in words is "eighty-five billion, two hundred thirty-eight million, five hundred twenty-one thousand, two hundred twelve".