73225231 has 4 divisors (see below), whose sum is σ = 73371312. Its totient is φ = 73079152.

The previous prime is 73225223. The next prime is 73225237. The reversal of 73225231 is 13252237.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13252237 = 97 ⋅136621.

It is a cyclic number.

It is not a de Polignac number, because 73225231 - 2³ = 73225223 is a prime.

It is a super-2 number, since 2×73225231² = 10723868910006722, 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 = 73225196 and 73225205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73225237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 72286 + ... + 73291.

It is an arithmetic number, because the mean of its divisors is an integer number (18342828).

Almost surely, 2^73225231 is an apocalyptic number.

73225231 is a deficient number, since it is larger than the sum of its proper divisors (146081).

73225231 is a wasteful number, since it uses less digits than its factorization.

73225231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146080.

The product of its digits is 2520, while the sum is 25.

The square root of 73225231 is about 8557.1742415356. The cubic root of 73225231 is about 418.3633033383.

Adding to 73225231 its reverse (13252237), we get a palindrome (86477468).

The spelling of 73225231 in words is "seventy-three million, two hundred twenty-five thousand, two hundred thirty-one".