2172919959 has 64 divisors (see below), whose sum is σ = 3760128000. Its totient is φ = 1214611200.

The previous prime is 2172919949. The next prime is 2172919961. The reversal of 2172919959 is 9599192712.

2172919959 is a `hidden beast` number, since 217 + 291 + 99 + 59 = 666.

It is not a de Polignac number, because 2172919959 - 2⁴ = 2172919943 is a prime.

It is a super-2 number, since 2×2172919959² = 9443162296441123362, which contains 22 as substring.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2172919919) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1698282 + ... + 1699560.

It is an arithmetic number, because the mean of its divisors is an integer number (58752000).

Almost surely, 2^2172919959 is an apocalyptic number.

2172919959 is a deficient number, since it is larger than the sum of its proper divisors (1587208041).

2172919959 is a wasteful number, since it uses less digits than its factorization.

2172919959 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1485 (or 1479 counting only the distinct ones).

The product of its digits is 918540, while the sum is 54.

The square root of 2172919959 is about 46614.5895509121. The cubic root of 2172919959 is about 1295.2330263466.

The spelling of 2172919959 in words is "two billion, one hundred seventy-two million, nine hundred nineteen thousand, nine hundred fifty-nine".