131211342 has 12 divisors (see below), whose sum is σ = 284291280. Its totient is φ = 43737108.

The previous prime is 131211323. The next prime is 131211347. The reversal of 131211342 is 243112131.

131211342 is a `hidden beast` number, since 1 + 312 + 11 + 342 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 7289519 = 131211342 / (1 + 3 + 1 + 2 + 1 + 1 + 3 + 4 + 2).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131211347) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3644742 + ... + 3644777.

It is an arithmetic number, because the mean of its divisors is an integer number (23690940).

Almost surely, 2^131211342 is an apocalyptic number.

131211342 is an abundant number, since it is smaller than the sum of its proper divisors (153079938).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

131211342 is a wasteful number, since it uses less digits than its factorization.

131211342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7289527 (or 7289524 counting only the distinct ones).

The product of its digits is 144, while the sum is 18.

The square root of 131211342 is about 11454.7519396973. The cubic root of 131211342 is about 508.1482790949.

Adding to 131211342 its reverse (243112131), we get a palindrome (374323473).

The spelling of 131211342 in words is "one hundred thirty-one million, two hundred eleven thousand, three hundred forty-two".