72231549 has 8 divisors (see below), whose sum is σ = 103717152. Its totient is φ = 44450160.

The previous prime is 72231539. The next prime is 72231553. The reversal of 72231549 is 94513227.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 72231549 - 2⁹ = 72231037 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72231539) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 926007 + ... + 926084.

It is an arithmetic number, because the mean of its divisors is an integer number (12964644).

Almost surely, 2^72231549 is an apocalyptic number.

It is an amenable number.

72231549 is a deficient number, since it is larger than the sum of its proper divisors (31485603).

72231549 is a wasteful number, since it uses less digits than its factorization.

72231549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1852107.

The product of its digits is 15120, while the sum is 33.

The square root of 72231549 is about 8498.9145777564. The cubic root of 72231549 is about 416.4622515889.

The spelling of 72231549 in words is "seventy-two million, two hundred thirty-one thousand, five hundred forty-nine".