2113491381 has 8 divisors (see below), whose sum is σ = 2818368384. Its totient is φ = 1408804320.

The previous prime is 2113491343. The next prime is 2113491389. The reversal of 2113491381 is 1831943112.

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

It is not a de Polignac number, because 2113491381 - 2¹¹ = 2113489333 is a prime.

It is a super-2 number, since 2×2113491381² = 8933691635122574322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2113491389) 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, 19096 + ... + 67761.

It is an arithmetic number, because the mean of its divisors is an integer number (352296048).

Almost surely, 2^2113491381 is an apocalyptic number.

It is an amenable number.

2113491381 is a deficient number, since it is larger than the sum of its proper divisors (704877003).

2113491381 is an equidigital number, since it uses as much as digits as its factorization.

2113491381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94971.

The product of its digits is 5184, while the sum is 33.

The square root of 2113491381 is about 45972.7243156200. The cubic root of 2113491381 is about 1283.3156594107.

The spelling of 2113491381 in words is "two billion, one hundred thirteen million, four hundred ninety-one thousand, three hundred eighty-one".