131223320 has 16 divisors (see below), whose sum is σ = 295252560. Its totient is φ = 52489312.

The previous prime is 131223317. The next prime is 131223361. The reversal of 131223320 is 23322131.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1640252 + ... + 1640331.

It is an arithmetic number, because the mean of its divisors is an integer number (18453285).

Almost surely, 2^131223320 is an apocalyptic number.

131223320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131223320 is an abundant number, since it is smaller than the sum of its proper divisors (164029240).

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

131223320 is a wasteful number, since it uses less digits than its factorization.

131223320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3280594 (or 3280590 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 131223320 is about 11455.2747675470. The cubic root of 131223320 is about 508.1637412107.

Adding to 131223320 its reverse (23322131), we get a palindrome (154545451).

The spelling of 131223320 in words is "one hundred thirty-one million, two hundred twenty-three thousand, three hundred twenty".