85411731 has 8 divisors (see below), whose sum is σ = 115254720. Its totient is φ = 56254952.

The previous prime is 85411721. The next prime is 85411759. The reversal of 85411731 is 13711458.

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

It is a cyclic number.

It is not a de Polignac number, because 85411731 - 2⁹ = 85411219 is a prime.

It is a super-2 number, since 2×85411731² = 14590327584832722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (85411721) 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, 171261 + ... + 171758.

It is an arithmetic number, because the mean of its divisors is an integer number (14406840).

Almost surely, 2^85411731 is an apocalyptic number.

85411731 is a deficient number, since it is larger than the sum of its proper divisors (29842989).

85411731 is a wasteful number, since it uses less digits than its factorization.

85411731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 343105.

The product of its digits is 3360, while the sum is 30.

The square root of 85411731 is about 9241.8467310381. The cubic root of 85411731 is about 440.3917499348.

The spelling of 85411731 in words is "eighty-five million, four hundred eleven thousand, seven hundred thirty-one".