85238521213 has 4 divisors (see below), whose sum is σ = 87220812448. Its totient is φ = 83256229980.

The previous prime is 85238521211. The next prime is 85238521267. The reversal of 85238521213 is 31212583258.

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 85238521213 - 2¹ = 85238521211 is a prime.

It is a Duffinian number.

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 3 ways as a sum of consecutive naturals, for example, 991145553 + ... + 991145638.

It is an arithmetic number, because the mean of its divisors is an integer number (21805203112).

Almost surely, 2^85238521213 is an apocalyptic number.

It is an amenable number.

85238521213 is a deficient number, since it is larger than the sum of its proper divisors (1982291235).

85238521213 is a wasteful number, since it uses less digits than its factorization.

85238521213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1982291234.

The product of its digits is 115200, while the sum is 40.

The spelling of 85238521213 in words is "eighty-five billion, two hundred thirty-eight million, five hundred twenty-one thousand, two hundred thirteen".