2172401233 has 32 divisors (see below), whose sum is σ = 2386778240. Its totient is φ = 1970749440.

The previous prime is 2172401173. The next prime is 2172401249. The reversal of 2172401233 is 3321042712.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2172401233 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2172401198 and 2172401207.

It is not an unprimeable number, because it can be changed into a prime (2172401333) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9013993 + ... + 9014233.

It is an arithmetic number, because the mean of its divisors is an integer number (74586820).

Almost surely, 2^2172401233 is an apocalyptic number.

It is an amenable number.

2172401233 is a deficient number, since it is larger than the sum of its proper divisors (214377007).

2172401233 is a wasteful number, since it uses less digits than its factorization.

2172401233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 497.

The product of its (nonzero) digits is 2016, while the sum is 25.

The square root of 2172401233 is about 46609.0252311717. The cubic root of 2172401233 is about 1295.1299508338.

Adding to 2172401233 its reverse (3321042712), we get a palindrome (5493443945).

The spelling of 2172401233 in words is "two billion, one hundred seventy-two million, four hundred one thousand, two hundred thirty-three".