85571507 has 4 divisors (see below), whose sum is σ = 97796016. Its totient is φ = 73347000.

The previous prime is 85571467. The next prime is 85571531. The reversal of 85571507 is 70517558.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 85571507 - 2¹⁸ = 85309363 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85571587) 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, 6112244 + ... + 6112257.

It is an arithmetic number, because the mean of its divisors is an integer number (24449004).

Almost surely, 2^85571507 is an apocalyptic number.

85571507 is a deficient number, since it is larger than the sum of its proper divisors (12224509).

85571507 is a wasteful number, since it uses less digits than its factorization.

85571507 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12224508.

The product of its (nonzero) digits is 49000, while the sum is 38.

The square root of 85571507 is about 9250.4868520527. The cubic root of 85571507 is about 440.6661860936. Note that the first 3 decimals are identical.

The spelling of 85571507 in words is "eighty-five million, five hundred seventy-one thousand, five hundred seven".