131920326 has 36 divisors (see below), whose sum is σ = 296983596. Its totient is φ = 43889040.

The previous prime is 131920319. The next prime is 131920331. The reversal of 131920326 is 623029131.

131920326 is a `hidden beast` number, since 1 + 319 + 20 + 326 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 131920326.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 252946 + ... + 253466.

Almost surely, 2^131920326 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 131920326, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (148491798).

131920326 is an abundant number, since it is smaller than the sum of its proper divisors (165063270).

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

131920326 is an frugal number, since it uses more digits than its factorization.

131920326 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1059 (or 526 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 27.

The square root of 131920326 is about 11485.6574039103. The cubic root of 131920326 is about 509.0618740263.

Multiplying 131920326 by its product of nonzero digits (1944), we get a square (256453113744 = 506412²).

Adding to 131920326 its reverse (623029131), we get a palindrome (754949457).

The spelling of 131920326 in words is "one hundred thirty-one million, nine hundred twenty thousand, three hundred twenty-six".