131205142345 has 16 divisors (see below), whose sum is σ = 158473687680. Its totient is φ = 104279776384.

The previous prime is 131205142307. The next prime is 131205142379. The reversal of 131205142345 is 543241502131.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131205142345 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1556286 + ... + 1638424.

It is an arithmetic number, because the mean of its divisors is an integer number (9904605480).

Almost surely, 2^131205142345 is an apocalyptic number.

It is an amenable number.

131205142345 is a deficient number, since it is larger than the sum of its proper divisors (27268545335).

131205142345 is a wasteful number, since it uses less digits than its factorization.

131205142345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84224.

The product of its (nonzero) digits is 14400, while the sum is 31.

Adding to 131205142345 its reverse (543241502131), we get a palindrome (674446644476).

The spelling of 131205142345 in words is "one hundred thirty-one billion, two hundred five million, one hundred forty-two thousand, three hundred forty-five".