131220330 has 32 divisors (see below), whose sum is σ = 315273600. Its totient is φ = 34953792.

The previous prime is 131220329. The next prime is 131220361. The reversal of 131220330 is 33022131.

It is a Harshad number since it is a multiple of its sum of digits (15).

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, 35091 + ... + 38649.

It is an arithmetic number, because the mean of its divisors is an integer number (9852300).

Almost surely, 2^131220330 is an apocalyptic number.

131220330 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

131220330 is an abundant number, since it is smaller than the sum of its proper divisors (184053270).

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

131220330 is a wasteful number, since it uses less digits than its factorization.

131220330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4798.

The product of its (nonzero) digits is 108, while the sum is 15.

The square root of 131220330 is about 11455.1442592400. The cubic root of 131220330 is about 508.1598815788.

Adding to 131220330 its reverse (33022131), we get a palindrome (164242461).

The spelling of 131220330 in words is "one hundred thirty-one million, two hundred twenty thousand, three hundred thirty".