85381550 has 12 divisors (see below), whose sum is σ = 158809776. Its totient is φ = 34152600.

The previous prime is 85381529. The next prime is 85381559. The reversal of 85381550 is 5518358.

It is a self number, because there is not a number n which added to its sum of digits gives 85381550.

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 in 5 ways as a sum of consecutive naturals, for example, 853766 + ... + 853865.

It is an arithmetic number, because the mean of its divisors is an integer number (13234148).

Almost surely, 2^85381550 is an apocalyptic number.

85381550 is a deficient number, since it is larger than the sum of its proper divisors (73428226).

85381550 is a wasteful number, since it uses less digits than its factorization.

85381550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1707643 (or 1707638 counting only the distinct ones).

The product of its (nonzero) digits is 24000, while the sum is 35.

The square root of 85381550 is about 9240.2137421166. The cubic root of 85381550 is about 440.3398717009.

The spelling of 85381550 in words is "eighty-five million, three hundred eighty-one thousand, five hundred fifty".