85238513 has 4 divisors (see below), whose sum is σ = 87220848. Its totient is φ = 83256180.

The previous prime is 85238509. The next prime is 85238581. The reversal of 85238513 is 31583258.

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 85238513 - 2² = 85238509 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85232513) 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, 991103 + ... + 991188.

It is an arithmetic number, because the mean of its divisors is an integer number (21805212).

Almost surely, 2^85238513 is an apocalyptic number.

It is an amenable number.

85238513 is a deficient number, since it is larger than the sum of its proper divisors (1982335).

85238513 is a wasteful number, since it uses less digits than its factorization.

85238513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1982334.

The product of its digits is 28800, while the sum is 35.

The square root of 85238513 is about 9232.4705794278. The cubic root of 85238513 is about 440.0938384568.

The spelling of 85238513 in words is "eighty-five million, two hundred thirty-eight thousand, five hundred thirteen".