131223330 has 48 divisors (see below), whose sum is σ = 389922624. Its totient is φ = 29993760.

The previous prime is 131223317. The next prime is 131223361. The reversal of 131223330 is 33322131.

131223330 is a `hidden beast` number, since 1 + 312 + 23 + 330 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 103516 + ... + 104775.

It is an arithmetic number, because the mean of its divisors is an integer number (8123388).

Almost surely, 2^131223330 is an apocalyptic number.

131223330 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

131223330 is an abundant number, since it is smaller than the sum of its proper divisors (258699294).

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

131223330 is a wasteful number, since it uses less digits than its factorization.

131223330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208311 (or 208308 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 18.

The square root of 131223330 is about 11455.2752040272. The cubic root of 131223330 is about 508.1637541190.

Adding to 131223330 its reverse (33322131), we get a palindrome (164545461).

It can be divided in two parts, 1312 and 23330, that added together give a palindrome (24642).

The spelling of 131223330 in words is "one hundred thirty-one million, two hundred twenty-three thousand, three hundred thirty".