1981413211 has 8 divisors (see below), whose sum is σ = 2029042224. Its totient is φ = 1933854720.

The previous prime is 1981413199. The next prime is 1981413229. The reversal of 1981413211 is 1123141891.

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 1981413211 - 2¹⁷ = 1981282139 is a prime.

It is a super-3 number, since 3×1981413211³ (a number of 29 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1981413241) 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, 41595 + ... + 75451.

It is an arithmetic number, because the mean of its divisors is an integer number (253630278).

Almost surely, 2^1981413211 is an apocalyptic number.

1981413211 is a deficient number, since it is larger than the sum of its proper divisors (47629013).

1981413211 is a wasteful number, since it uses less digits than its factorization.

1981413211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35261.

The product of its digits is 1728, while the sum is 31.

The square root of 1981413211 is about 44513.0678677622. The cubic root of 1981413211 is about 1256.0059153152.

The spelling of 1981413211 in words is "one billion, nine hundred eighty-one million, four hundred thirteen thousand, two hundred eleven".