2172431073 has 4 divisors (see below), whose sum is σ = 2896574768. Its totient is φ = 1448287380.

The previous prime is 2172431069. The next prime is 2172431083. The reversal of 2172431073 is 3701342712.

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 2172431073 - 2² = 2172431069 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2172431073.

It is not an unprimeable number, because it can be changed into a prime (2172431083) 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, 362071843 + ... + 362071848.

It is an arithmetic number, because the mean of its divisors is an integer number (724143692).

Almost surely, 2^2172431073 is an apocalyptic number.

It is an amenable number.

2172431073 is a deficient number, since it is larger than the sum of its proper divisors (724143695).

2172431073 is an equidigital number, since it uses as much as digits as its factorization.

2172431073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 724143694.

The product of its (nonzero) digits is 7056, while the sum is 30.

The square root of 2172431073 is about 46609.3453397492. The cubic root of 2172431073 is about 1295.1358807544.

Adding to 2172431073 its reverse (3701342712), we get a palindrome (5873773785).

The spelling of 2172431073 in words is "two billion, one hundred seventy-two million, four hundred thirty-one thousand, seventy-three".