131206351 has 4 divisors (see below), whose sum is σ = 131230792. Its totient is φ = 131181912.

The previous prime is 131206337. The next prime is 131206379. The reversal of 131206351 is 153602131.

It is a happy number.

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 131206351 - 2⁵ = 131206319 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131206321) 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, 276 + ... + 16201.

It is an arithmetic number, because the mean of its divisors is an integer number (32807698).

Almost surely, 2^131206351 is an apocalyptic number.

131206351 is a deficient number, since it is larger than the sum of its proper divisors (24441).

131206351 is an equidigital number, since it uses as much as digits as its factorization.

131206351 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24440.

The product of its (nonzero) digits is 540, while the sum is 22.

The square root of 131206351 is about 11454.5340804417. The cubic root of 131206351 is about 508.1418360538.

Adding to 131206351 its reverse (153602131), we get a palindrome (284808482).

The spelling of 131206351 in words is "one hundred thirty-one million, two hundred six thousand, three hundred fifty-one".