131220352 has 64 divisors (see below), whose sum is σ = 272095200. Its totient is φ = 62982144.

The previous prime is 131220329. The next prime is 131220361. The reversal of 131220352 is 253022131.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 487674 + ... + 487942.

Almost surely, 2^131220352 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 131220352, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (136047600).

131220352 is an abundant number, since it is smaller than the sum of its proper divisors (140874848).

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

131220352 is a wasteful number, since it uses less digits than its factorization.

131220352 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 423 (or 411 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 131220352 is about 11455.1452195073. The cubic root of 131220352 is about 508.1599099776.

Adding to 131220352 its reverse (253022131), we get a palindrome (384242483).

The spelling of 131220352 in words is "one hundred thirty-one million, two hundred twenty thousand, three hundred fifty-two".