85233121 has 16 divisors (see below), whose sum is σ = 92243664. Its totient is φ = 78465024.

The previous prime is 85233079. The next prime is 85233131. The reversal of 85233121 is 12133258.

It can be written as a sum of positive squares in 8 ways, for example, as 20205025 + 65028096 = 4495^2 + 8064^2 .

It is a cyclic number.

It is not a de Polignac number, because 85233121 - 2¹¹ = 85231073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85233131) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 214495 + ... + 214891.

It is an arithmetic number, because the mean of its divisors is an integer number (5765229).

Almost surely, 2^85233121 is an apocalyptic number.

It is an amenable number.

85233121 is a deficient number, since it is larger than the sum of its proper divisors (7010543).

85233121 is a wasteful number, since it uses less digits than its factorization.

85233121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 660.

The product of its digits is 1440, while the sum is 25.

The square root of 85233121 is about 9232.1785619647. The cubic root of 85233121 is about 440.0845584732.

Adding to 85233121 its reverse (12133258), we get a palindrome (97366379).

The spelling of 85233121 in words is "eighty-five million, two hundred thirty-three thousand, one hundred twenty-one".