72203621 has 8 divisors (see below), whose sum is σ = 83025984. Its totient is φ = 61508160.

The previous prime is 72203603. The next prime is 72203623. The reversal of 72203621 is 12630227.

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

It is not a de Polignac number, because 72203621 - 2¹⁰ = 72202597 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72203623) 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, 30500 + ... + 32781.

It is an arithmetic number, because the mean of its divisors is an integer number (10378248).

Almost surely, 2^72203621 is an apocalyptic number.

It is an amenable number.

72203621 is a deficient number, since it is larger than the sum of its proper divisors (10822363).

72203621 is a wasteful number, since it uses less digits than its factorization.

72203621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63451.

The product of its (nonzero) digits is 1008, while the sum is 23.

The square root of 72203621 is about 8497.2713855684. The cubic root of 72203621 is about 416.4085702578.

Adding to 72203621 its reverse (12630227), we get a palindrome (84833848).

The spelling of 72203621 in words is "seventy-two million, two hundred three thousand, six hundred twenty-one".