2172099450 has 48 divisors (see below), whose sum is σ = 5462703936. Its totient is φ = 571065600.

The previous prime is 2172099443. The next prime is 2172099481. The reversal of 2172099450 is 549902712.

It is a junction number, because it is equal to n+sod(n) for n = 2172099399 and 2172099408.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 91327 + ... + 112626.

It is an arithmetic number, because the mean of its divisors is an integer number (113806332).

Almost surely, 2^2172099450 is an apocalyptic number.

2172099450 is an abundant number, since it is smaller than the sum of its proper divisors (3290604486).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2172099450 is a wasteful number, since it uses less digits than its factorization.

2172099450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204039 (or 204034 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 39.

The square root of 2172099450 is about 46605.7877307100. The cubic root of 2172099450 is about 1295.0699762926.

The spelling of 2172099450 in words is "two billion, one hundred seventy-two million, ninety-nine thousand, four hundred fifty".