85221153 has 40 divisors (see below), whose sum is σ = 135907200. Its totient is φ = 53032320.

The previous prime is 85221107. The next prime is 85221197. The reversal of 85221153 is 35112258.

It is a happy number.

It is not a de Polignac number, because 85221153 - 2¹⁷ = 85090081 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (85221553) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 273868 + ... + 274178.

It is an arithmetic number, because the mean of its divisors is an integer number (3397680).

Almost surely, 2^85221153 is an apocalyptic number.

It is an amenable number.

85221153 is a deficient number, since it is larger than the sum of its proper divisors (50686047).

85221153 is a wasteful number, since it uses less digits than its factorization.

85221153 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 539 (or 530 counting only the distinct ones).

The product of its digits is 2400, while the sum is 27.

The square root of 85221153 is about 9231.5303715040. The cubic root of 85221153 is about 440.0639593662.

The spelling of 85221153 in words is "eighty-five million, two hundred twenty-one thousand, one hundred fifty-three".