85143545 has 8 divisors (see below), whose sum is σ = 102294024. Its totient is φ = 68033664.

The previous prime is 85143529. The next prime is 85143547. The reversal of 85143545 is 54534158.

It can be written as a sum of positive squares in 4 ways, for example, as 1731856 + 83411689 = 1316^2 + 9133^2 .

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 85143545 - 2⁴ = 85143529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85143547) 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, 5324 + ... + 14093.

It is an arithmetic number, because the mean of its divisors is an integer number (12786753).

Almost surely, 2^85143545 is an apocalyptic number.

It is an amenable number.

85143545 is a deficient number, since it is larger than the sum of its proper divisors (17150479).

85143545 is a wasteful number, since it uses less digits than its factorization.

85143545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20299.

The product of its digits is 48000, while the sum is 35.

The square root of 85143545 is about 9227.3259940245. The cubic root of 85143545 is about 439.9303350449.

The spelling of 85143545 in words is "eighty-five million, one hundred forty-three thousand, five hundred forty-five".