131261231 has 8 divisors (see below), whose sum is σ = 134797824. Its totient is φ = 127764000.

The previous prime is 131261219. The next prime is 131261239. The reversal of 131261231 is 132162131.

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 131261231 - 2⁶ = 131261167 is a prime.

It is a super-2 number, since 2×131261231² = 34459021527270722, 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 (131261239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3020 + ... + 16481.

It is an arithmetic number, because the mean of its divisors is an integer number (16849728).

Almost surely, 2^131261231 is an apocalyptic number.

131261231 is a deficient number, since it is larger than the sum of its proper divisors (3536593).

131261231 is a wasteful number, since it uses less digits than its factorization.

131261231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19681.

The product of its digits is 216, while the sum is 20.

The square root of 131261231 is about 11456.9293879294. The cubic root of 131261231 is about 508.2126734194.

The spelling of 131261231 in words is "one hundred thirty-one million, two hundred sixty-one thousand, two hundred thirty-one".