73233121 has 16 divisors (see below), whose sum is σ = 80985744. Its totient is φ = 65804544.

The previous prime is 73233073. The next prime is 73233137. The reversal of 73233121 is 12133237.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 2016400 + 71216721 = 1420^2 + 8439^2 .

It is not a de Polignac number, because 73233121 - 2¹³ = 73224929 is a prime.

It is a super-2 number, since 2×73233121² = 10726180022801282, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 73233092 and 73233101.

It is not an unprimeable number, because it can be changed into a prime (73233521) 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, 107835 + ... + 108511.

It is an arithmetic number, because the mean of its divisors is an integer number (5061609).

Almost surely, 2^73233121 is an apocalyptic number.

It is an amenable number.

73233121 is a deficient number, since it is larger than the sum of its proper divisors (7752623).

73233121 is a wasteful number, since it uses less digits than its factorization.

73233121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 900.

The product of its digits is 756, while the sum is 22.

The square root of 73233121 is about 8557.6352457907. The cubic root of 73233121 is about 418.3783289785.

Adding to 73233121 its reverse (12133237), we get a palindrome (85366358).

The spelling of 73233121 in words is "seventy-three million, two hundred thirty-three thousand, one hundred twenty-one".