131443320 has 64 divisors (see below), whose sum is σ = 417532320. Its totient is φ = 32989184.

The previous prime is 131443307. The next prime is 131443373. The reversal of 131443320 is 23344131.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30177 + ... + 34256.

Almost surely, 2^131443320 is an apocalyptic number.

131443320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131443320 is an abundant number, since it is smaller than the sum of its proper divisors (286089000).

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

131443320 is a wasteful number, since it uses less digits than its factorization.

131443320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64464 (or 64460 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 131443320 is about 11464.8733093742. The cubic root of 131443320 is about 508.4475667906.

Adding to 131443320 its reverse (23344131), we get a palindrome (154787451).

The spelling of 131443320 in words is "one hundred thirty-one million, four hundred forty-three thousand, three hundred twenty".