85381558 has 4 divisors (see below), whose sum is σ = 128072340. Its totient is φ = 42690778.

The previous prime is 85381529. The next prime is 85381559. The reversal of 85381558 is 85518358.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85381559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21345388 + ... + 21345391.

It is an arithmetic number, because the mean of its divisors is an integer number (32018085).

Almost surely, 2^85381558 is an apocalyptic number.

85381558 is a deficient number, since it is larger than the sum of its proper divisors (42690782).

85381558 is a wasteful number, since it uses less digits than its factorization.

85381558 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42690781.

The product of its digits is 192000, while the sum is 43.

The square root of 85381558 is about 9240.2141750070. The cubic root of 85381558 is about 440.3398854537.

The spelling of 85381558 in words is "eighty-five million, three hundred eighty-one thousand, five hundred fifty-eight".