2199499681 has 8 divisors (see below), whose sum is σ = 2218587624. Its totient is φ = 2180492160.

The previous prime is 2199499667. The next prime is 2199499691. The reversal of 2199499681 is 1869949912.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1712635456 + 486864225 = 41384^2 + 22065^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2199499681 - 2⁵ = 2199499649 is a prime.

It is a super-2 number, since 2×2199499681² = 9675597693438203522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2199499691) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35491 + ... + 75223.

It is an arithmetic number, because the mean of its divisors is an integer number (277323453).

Almost surely, 2^2199499681 is an apocalyptic number.

It is an amenable number.

2199499681 is a deficient number, since it is larger than the sum of its proper divisors (19087943).

2199499681 is a wasteful number, since it uses less digits than its factorization.

2199499681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40211.

The product of its digits is 2519424, while the sum is 58.

The square root of 2199499681 is about 46898.8238765110. The cubic root of 2199499681 is about 1300.4928468596.

The spelling of 2199499681 in words is "two billion, one hundred ninety-nine million, four hundred ninety-nine thousand, six hundred eighty-one".