2290011981 has 8 divisors (see below), whose sum is σ = 3053588640. Its totient is φ = 1526554992.

The previous prime is 2290011959. The next prime is 2290011989. The reversal of 2290011981 is 1891100922.

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

It is not a de Polignac number, because 2290011981 - 2⁷ = 2290011853 is a prime.

It is a super-2 number, since 2×2290011981² = 10488309746247088722, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2290011989) 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, 34635 + ... + 76023.

It is an arithmetic number, because the mean of its divisors is an integer number (381698580).

Almost surely, 2^2290011981 is an apocalyptic number.

It is an amenable number.

2290011981 is a deficient number, since it is larger than the sum of its proper divisors (763576659).

2290011981 is a wasteful number, since it uses less digits than its factorization.

2290011981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59835.

The product of its (nonzero) digits is 2592, while the sum is 33.

The square root of 2290011981 is about 47854.0696388510. The cubic root of 2290011981 is about 1318.0925888812.

The spelling of 2290011981 in words is "two billion, two hundred ninety million, eleven thousand, nine hundred eighty-one".