2219380981 has 4 divisors (see below), whose sum is σ = 2221560000. Its totient is φ = 2217201964.

The previous prime is 2219380951. The next prime is 2219381009. The reversal of 2219380981 is 1890839122.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2219380981 - 2⁵ = 2219380949 is a prime.

It is a super-2 number, since 2×2219380981² = 9851303877649044722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2219380901) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1087981 + ... + 1090018.

It is an arithmetic number, because the mean of its divisors is an integer number (555390000).

Almost surely, 2^2219380981 is an apocalyptic number.

It is an amenable number.

2219380981 is a deficient number, since it is larger than the sum of its proper divisors (2179019).

2219380981 is a wasteful number, since it uses less digits than its factorization.

2219380981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2179018.

The product of its (nonzero) digits is 62208, while the sum is 43.

The square root of 2219380981 is about 47110.3065262794. The cubic root of 2219380981 is about 1304.3994890298.

The spelling of 2219380981 in words is "two billion, two hundred nineteen million, three hundred eighty thousand, nine hundred eighty-one".