131643326 has 4 divisors (see below), whose sum is σ = 197464992. Its totient is φ = 65821662.

The previous prime is 131643313. The next prime is 131643377. The reversal of 131643326 is 623346131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 623346131 = 9103 ⋅68477.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 32910830 + ... + 32910833.

It is an arithmetic number, because the mean of its divisors is an integer number (49366248).

Almost surely, 2^131643326 is an apocalyptic number.

131643326 is a deficient number, since it is larger than the sum of its proper divisors (65821666).

131643326 is an equidigital number, since it uses as much as digits as its factorization.

131643326 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65821665.

The product of its digits is 7776, while the sum is 29.

The square root of 131643326 is about 11473.5925498512. The cubic root of 131643326 is about 508.7053230834.

Adding to 131643326 its reverse (623346131), we get a palindrome (754989457).

The spelling of 131643326 in words is "one hundred thirty-one million, six hundred forty-three thousand, three hundred twenty-six".