85621550 has 24 divisors (see below), whose sum is σ = 182007696. Its totient is φ = 29355840.

The previous prime is 85621517. The next prime is 85621559. The reversal of 85621550 is 5512658.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85621559) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 121967 + ... + 122666.

It is an arithmetic number, because the mean of its divisors is an integer number (7583654).

Almost surely, 2^85621550 is an apocalyptic number.

85621550 is an abundant number, since it is smaller than the sum of its proper divisors (96386146).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

85621550 is a wasteful number, since it uses less digits than its factorization.

85621550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 244652 (or 244647 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 32.

The square root of 85621550 is about 9253.1913413697. The cubic root of 85621550 is about 440.7520712258.

The spelling of 85621550 in words is "eighty-five million, six hundred twenty-one thousand, five hundred fifty".