131645424 has 80 divisors (see below), whose sum is σ = 351477504. Its totient is φ = 42432000.

The previous prime is 131645401. The next prime is 131645429. The reversal of 131645424 is 424546131.

Its product of digits (11520) is a multiple of the sum of its prime divisors (640).

It is a junction number, because it is equal to n+sod(n) for n = 131645391 and 131645400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131645429) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 296947 + ... + 297389.

Almost surely, 2^131645424 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 131645424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (175738752).

131645424 is an abundant number, since it is smaller than the sum of its proper divisors (219832080).

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

131645424 is a wasteful number, since it uses less digits than its factorization.

131645424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 646 (or 640 counting only the distinct ones).

The product of its digits is 11520, while the sum is 30.

The square root of 131645424 is about 11473.6839768228. The cubic root of 131645424 is about 508.7080254817.

The spelling of 131645424 in words is "one hundred thirty-one million, six hundred forty-five thousand, four hundred twenty-four".