73725231 has 4 divisors (see below), whose sum is σ = 98300312. Its totient is φ = 49150152.

The previous prime is 73725229. The next prime is 73725241. The reversal of 73725231 is 13252737.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 73725231 - 2¹ = 73725229 is a prime.

It is a super-2 number, since 2×73725231² = 10870819372006722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73725241) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12287536 + ... + 12287541.

It is an arithmetic number, because the mean of its divisors is an integer number (24575078).

Almost surely, 2^73725231 is an apocalyptic number.

73725231 is a deficient number, since it is larger than the sum of its proper divisors (24575081).

73725231 is a wasteful number, since it uses less digits than its factorization.

73725231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24575080.

The product of its digits is 8820, while the sum is 30.

The square root of 73725231 is about 8586.3397906209. The cubic root of 73725231 is about 419.3133735626.

Adding to 73725231 its reverse (13252737), we get a palindrome (86977968).

The spelling of 73725231 in words is "seventy-three million, seven hundred twenty-five thousand, two hundred thirty-one".