131200231 has 4 divisors (see below), whose sum is σ = 131277672. Its totient is φ = 131122792.

The previous prime is 131200229. The next prime is 131200241. The reversal of 131200231 is 132002131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 132002131 = 43 ⋅3069817.

It is a cyclic number.

It is not a de Polignac number, because 131200231 - 2¹ = 131200229 is a prime.

It is a super-2 number, since 2×131200231² = 34427001228906722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131200241) 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, 36121 + ... + 39586.

It is an arithmetic number, because the mean of its divisors is an integer number (32819418).

Almost surely, 2^131200231 is an apocalyptic number.

131200231 is a deficient number, since it is larger than the sum of its proper divisors (77441).

131200231 is an equidigital number, since it uses as much as digits as its factorization.

131200231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77440.

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 131200231 is about 11454.2669342040. The cubic root of 131200231 is about 508.1339353275.

Adding to 131200231 its reverse (132002131), we get a palindrome (263202362).

The spelling of 131200231 in words is "one hundred thirty-one million, two hundred thousand, two hundred thirty-one".