131951311 has 4 divisors (see below), whose sum is σ = 133434000. Its totient is φ = 130468624.

The previous prime is 131951293. The next prime is 131951321. The reversal of 131951311 is 113159131.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 113159131 = 29 ⋅3902039.

It is a cyclic number.

It is not a de Polignac number, because 131951311 - 2¹⁷ = 131820239 is a prime.

It is a super-2 number, since 2×131951311² = 34822296949237442, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131951321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 741211 + ... + 741388.

It is an arithmetic number, because the mean of its divisors is an integer number (33358500).

Almost surely, 2^131951311 is an apocalyptic number.

131951311 is a deficient number, since it is larger than the sum of its proper divisors (1482689).

131951311 is an equidigital number, since it uses as much as digits as its factorization.

131951311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1482688.

The product of its digits is 405, while the sum is 25.

The square root of 131951311 is about 11487.0061808985. The cubic root of 131951311 is about 509.1017264834.

The spelling of 131951311 in words is "one hundred thirty-one million, nine hundred fifty-one thousand, three hundred eleven".