72133401 has 4 divisors (see below), whose sum is σ = 96177872. Its totient is φ = 48088932.

The previous prime is 72133393. The next prime is 72133441. The reversal of 72133401 is 10433127.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 72133401 - 2³ = 72133393 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (72133441) 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, 12022231 + ... + 12022236.

It is an arithmetic number, because the mean of its divisors is an integer number (24044468).

Almost surely, 2^72133401 is an apocalyptic number.

It is an amenable number.

72133401 is a deficient number, since it is larger than the sum of its proper divisors (24044471).

72133401 is a wasteful number, since it uses less digits than its factorization.

72133401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24044470.

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

The square root of 72133401 is about 8493.1384658441. The cubic root of 72133401 is about 416.2735368920.

Adding to 72133401 its reverse (10433127), we get a palindrome (82566528).

The spelling of 72133401 in words is "seventy-two million, one hundred thirty-three thousand, four hundred one".