131032261 has 4 divisors (see below), whose sum is σ = 131313312. Its totient is φ = 130751212.

The previous prime is 131032259. The next prime is 131032273. The reversal of 131032261 is 162230131.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 131032261 - 2¹ = 131032259 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131032211) 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, 139825 + ... + 140758.

It is an arithmetic number, because the mean of its divisors is an integer number (32828328).

Almost surely, 2^131032261 is an apocalyptic number.

It is an amenable number.

131032261 is a deficient number, since it is larger than the sum of its proper divisors (281051).

131032261 is an equidigital number, since it uses as much as digits as its factorization.

131032261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 281050.

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 131032261 is about 11446.9323838310. The cubic root of 131032261 is about 507.9169953972.

Adding to 131032261 its reverse (162230131), we get a palindrome (293262392).

The spelling of 131032261 in words is "one hundred thirty-one million, thirty-two thousand, two hundred sixty-one".