131538483231 has 4 divisors (see below), whose sum is σ = 175384644312. Its totient is φ = 87692322152.

The previous prime is 131538483221. The next prime is 131538483269. The reversal of 131538483231 is 132384835131.

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 131538483231 - 2⁷ = 131538483103 is a prime.

It is a super-2 number, since 2×131538483231² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131538483221) 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, 21923080536 + ... + 21923080541.

It is an arithmetic number, because the mean of its divisors is an integer number (43846161078).

Almost surely, 2^131538483231 is an apocalyptic number.

131538483231 is a deficient number, since it is larger than the sum of its proper divisors (43846161081).

131538483231 is an equidigital number, since it uses as much as digits as its factorization.

131538483231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43846161080.

The product of its digits is 207360, while the sum is 42.

The spelling of 131538483231 in words is "one hundred thirty-one billion, five hundred thirty-eight million, four hundred eighty-three thousand, two hundred thirty-one".