131215049 has 4 divisors (see below), whose sum is σ = 149960064. Its totient is φ = 112470036.

The previous prime is 131215043. The next prime is 131215057. The reversal of 131215049 is 940512131.

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 de Polignac number, because none of the positive numbers 2^k-131215049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131215043) 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, 9372497 + ... + 9372510.

It is an arithmetic number, because the mean of its divisors is an integer number (37490016).

Almost surely, 2^131215049 is an apocalyptic number.

It is an amenable number.

131215049 is a deficient number, since it is larger than the sum of its proper divisors (18745015).

131215049 is an equidigital number, since it uses as much as digits as its factorization.

131215049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18745014.

The product of its (nonzero) digits is 1080, while the sum is 26.

The square root of 131215049 is about 11454.9137491297. The cubic root of 131215049 is about 508.1530644737.

It can be divided in two parts, 1312 and 15049, that added together give a palindrome (16361).

The spelling of 131215049 in words is "one hundred thirty-one million, two hundred fifteen thousand, forty-nine".