85731516 has 72 divisors (see below), whose sum is σ = 239736224. Its totient is φ = 25660800.

The previous prime is 85731497. The next prime is 85731521. The reversal of 85731516 is 61513758.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14841 + ... + 19791.

Almost surely, 2^85731516 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 85731516, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (119868112).

85731516 is an abundant number, since it is smaller than the sum of its proper divisors (154004708).

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

85731516 is a wasteful number, since it uses less digits than its factorization.

85731516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5011 (or 5006 counting only the distinct ones).

The product of its digits is 25200, while the sum is 36.

The square root of 85731516 is about 9259.1314927481. The cubic root of 85731516 is about 440.9406803146.

The spelling of 85731516 in words is "eighty-five million, seven hundred thirty-one thousand, five hundred sixteen".