85521518 has 8 divisors (see below), whose sum is σ = 129528048. Its totient is φ = 42345504.

The previous prime is 85521497. The next prime is 85521563. The reversal of 85521518 is 81512558.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 207371 + ... + 207782.

It is an arithmetic number, because the mean of its divisors is an integer number (16191006).

Almost surely, 2^85521518 is an apocalyptic number.

85521518 is a deficient number, since it is larger than the sum of its proper divisors (44006530).

85521518 is a wasteful number, since it uses less digits than its factorization.

85521518 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 415258.

The product of its digits is 16000, while the sum is 35.

The square root of 85521518 is about 9247.7844914336. The cubic root of 85521518 is about 440.5803602011.

The spelling of 85521518 in words is "eighty-five million, five hundred twenty-one thousand, five hundred eighteen".