2172503401 has 4 divisors (see below), whose sum is σ = 2173238100. Its totient is φ = 2171768704.

The previous prime is 2172503351. The next prime is 2172503413. The reversal of 2172503401 is 1043052712.

It is a happy number.

2172503401 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 212139225 + 1960364176 = 14565^2 + 44276^2 .

It is a cyclic number.

It is not a de Polignac number, because 2172503401 - 2¹⁵ = 2172470633 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2172503441) 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, 362896 + ... + 368833.

It is an arithmetic number, because the mean of its divisors is an integer number (543309525).

Almost surely, 2^2172503401 is an apocalyptic number.

It is an amenable number.

2172503401 is a deficient number, since it is larger than the sum of its proper divisors (734699).

2172503401 is an equidigital number, since it uses as much as digits as its factorization.

2172503401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 734698.

The product of its (nonzero) digits is 1680, while the sum is 25.

The square root of 2172503401 is about 46610.1212291923. The cubic root of 2172503401 is about 1295.1502538300.

The spelling of 2172503401 in words is "two billion, one hundred seventy-two million, five hundred three thousand, four hundred one".