131230191 has 16 divisors (see below), whose sum is σ = 191656800. Its totient is φ = 79500288.

The previous prime is 131230189. The next prime is 131230199. The reversal of 131230191 is 191032131.

It is not a de Polignac number, because 131230191 - 2¹ = 131230189 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131230199) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42886 + ... + 45843.

It is an arithmetic number, because the mean of its divisors is an integer number (11978550).

Almost surely, 2^131230191 is an apocalyptic number.

131230191 is a deficient number, since it is larger than the sum of its proper divisors (60426609).

131230191 is a wasteful number, since it uses less digits than its factorization.

131230191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88778.

The product of its (nonzero) digits is 162, while the sum is 21.

The square root of 131230191 is about 11455.5746691294. The cubic root of 131230191 is about 508.1726103967.

The spelling of 131230191 in words is "one hundred thirty-one million, two hundred thirty thousand, one hundred ninety-one".