131023211 has 4 divisors (see below), whose sum is σ = 142934424. Its totient is φ = 119112000.

The previous prime is 131023163. The next prime is 131023223. The reversal of 131023211 is 112320131.

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 131023211 - 2⁶ = 131023147 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131023231) 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, 5955590 + ... + 5955611.

It is an arithmetic number, because the mean of its divisors is an integer number (35733606).

Almost surely, 2^131023211 is an apocalyptic number.

131023211 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

131023211 is a deficient number, since it is larger than the sum of its proper divisors (11911213).

131023211 is a wasteful number, since it uses less digits than its factorization.

131023211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11911212.

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 131023211 is about 11446.5370745916. The cubic root of 131023211 is about 507.9053017003.

Adding to 131023211 its reverse (112320131), we get a palindrome (243343342).

The spelling of 131023211 in words is "one hundred thirty-one million, twenty-three thousand, two hundred eleven".