2181049941 has 16 divisors (see below), whose sum is σ = 3328999424. Its totient is φ = 1244253744.

The previous prime is 2181049921. The next prime is 2181049943. The reversal of 2181049941 is 1499401812.

It is not a de Polignac number, because 2181049941 - 2⁵ = 2181049909 is a prime.

It is a super-2 number, since 2×2181049941² = 9513957690272206962, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2181049941.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2181049943) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 72805 + ... + 98298.

It is an arithmetic number, because the mean of its divisors is an integer number (208062464).

Almost surely, 2^2181049941 is an apocalyptic number.

2181049941 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2181049941 is a deficient number, since it is larger than the sum of its proper divisors (1147949483).

2181049941 is a wasteful number, since it uses less digits than its factorization.

2181049941 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171720.

The product of its (nonzero) digits is 20736, while the sum is 39.

The square root of 2181049941 is about 46701.7123990117. The cubic root of 2181049941 is about 1296.8463877336.

The spelling of 2181049941 in words is "two billion, one hundred eighty-one million, forty-nine thousand, nine hundred forty-one".