2179224981 has 24 divisors (see below), whose sum is σ = 3300949080. Its totient is φ = 1383492096.

The previous prime is 2179224973. The next prime is 2179224997. The reversal of 2179224981 is 1894229712.

It can be written as a sum of positive squares in 4 ways, for example, as 30902481 + 2148322500 = 5559^2 + 46350^2 .

It is not a de Polignac number, because 2179224981 - 2³ = 2179224973 is a prime.

It is a super-2 number, since 2×2179224981² = 9498043035628900722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2179224941) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 38136 + ... + 76241.

It is an arithmetic number, because the mean of its divisors is an integer number (137539545).

Almost surely, 2^2179224981 is an apocalyptic number.

It is an amenable number.

2179224981 is a deficient number, since it is larger than the sum of its proper divisors (1121724099).

2179224981 is a wasteful number, since it uses less digits than its factorization.

2179224981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114485 (or 114482 counting only the distinct ones).

The product of its digits is 145152, while the sum is 45.

The square root of 2179224981 is about 46682.1698403148. The cubic root of 2179224981 is about 1296.4845813784.

The spelling of 2179224981 in words is "two billion, one hundred seventy-nine million, two hundred twenty-four thousand, nine hundred eighty-one".