211313131 has 4 divisors (see below), whose sum is σ = 211432264. Its totient is φ = 211194000.

The previous prime is 211313129. The next prime is 211313147. The reversal of 211313131 is 131313112.

211313131 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 211313131 - 2¹ = 211313129 is a prime.

It is a super-2 number, since 2×211313131² = 89306478666046322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211313101) 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, 56865 + ... + 60466.

It is an arithmetic number, because the mean of its divisors is an integer number (52858066).

Almost surely, 2^211313131 is an apocalyptic number.

211313131 is a deficient number, since it is larger than the sum of its proper divisors (119133).

211313131 is a wasteful number, since it uses less digits than its factorization.

211313131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119132.

The product of its digits is 54, while the sum is 16.

The square root of 211313131 is about 14536.6134639399. The cubic root of 211313131 is about 595.6285343105.

Adding to 211313131 its reverse (131313112), we get a palindrome (342626243).

The spelling of 211313131 in words is "two hundred eleven million, three hundred thirteen thousand, one hundred thirty-one".