2172520023 has 16 divisors (see below), whose sum is σ = 2912959200. Its totient is φ = 1440230400.

The previous prime is 2172520019. The next prime is 2172520027. The reversal of 2172520023 is 3200252712.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (2172520019) and next prime (2172520027).

It is not a de Polignac number, because 2172520023 - 2² = 2172520019 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2172519975 and 2172520002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2172520027) 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, 774223 + ... + 777023.

It is an arithmetic number, because the mean of its divisors is an integer number (182059950).

Almost surely, 2^2172520023 is an apocalyptic number.

2172520023 is a deficient number, since it is larger than the sum of its proper divisors (740439177).

2172520023 is a wasteful number, since it uses less digits than its factorization.

2172520023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4162.

The product of its (nonzero) digits is 1680, while the sum is 24.

The square root of 2172520023 is about 46610.2995377631. The cubic root of 2172520023 is about 1295.1535569216.

Adding to 2172520023 its reverse (3200252712), we get a palindrome (5372772735).

The spelling of 2172520023 in words is "two billion, one hundred seventy-two million, five hundred twenty thousand, twenty-three".