85903531 has 8 divisors (see below), whose sum is σ = 98588160. Its totient is φ = 73322088.

The previous prime is 85903523. The next prime is 85903537. The reversal of 85903531 is 13530958.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 85903531 - 2³ = 85903523 is a prime.

It is a super-2 number, since 2×85903531² = 14758833276535922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85903537) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24001 + ... + 27346.

It is an arithmetic number, because the mean of its divisors is an integer number (12323520).

Almost surely, 2^85903531 is an apocalyptic number.

85903531 is a deficient number, since it is larger than the sum of its proper divisors (12684629).

85903531 is a wasteful number, since it uses less digits than its factorization.

85903531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51593.

The product of its (nonzero) digits is 16200, while the sum is 34.

The square root of 85903531 is about 9268.4157761723. The cubic root of 85903531 is about 441.2353900579.

It can be divided in two parts, 8590 and 3531, that added together give a palindrome (12121).

The spelling of 85903531 in words is "eighty-five million, nine hundred three thousand, five hundred thirty-one".