72203601 has 16 divisors (see below), whose sum is σ = 100653696. Its totient is φ = 45952896.

The previous prime is 72203597. The next prime is 72203603. The reversal of 72203601 is 10630227.

It is a happy number.

It is not a de Polignac number, because 72203601 - 2² = 72203597 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (72203603) 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, 69381 + ... + 70413.

It is an arithmetic number, because the mean of its divisors is an integer number (6290856).

Almost surely, 2^72203601 is an apocalyptic number.

It is an amenable number.

72203601 is a deficient number, since it is larger than the sum of its proper divisors (28450095).

72203601 is a wasteful number, since it uses less digits than its factorization.

72203601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2072.

The product of its (nonzero) digits is 504, while the sum is 21.

The square root of 72203601 is about 8497.2702087200. The cubic root of 72203601 is about 416.4085318102.

Adding to 72203601 its reverse (10630227), we get a palindrome (82833828).

The spelling of 72203601 in words is "seventy-two million, two hundred three thousand, six hundred one".