131223284 has 12 divisors (see below), whose sum is σ = 231673764. Its totient is φ = 65030784.

The previous prime is 131223277. The next prime is 131223293. The reversal of 131223284 is 482322131.

It can be written as a sum of positive squares in 2 ways, for example, as 5290000 + 125933284 = 2300^2 + 11222^2 .

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, 144707 + ... + 145610.

It is an arithmetic number, because the mean of its divisors is an integer number (19306147).

Almost surely, 2^131223284 is an apocalyptic number.

It is an amenable number.

131223284 is a deficient number, since it is larger than the sum of its proper divisors (100450480).

131223284 is a wasteful number, since it uses less digits than its factorization.

131223284 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 290434 (or 290432 counting only the distinct ones).

The product of its digits is 2304, while the sum is 26.

The square root of 131223284 is about 11455.2731962184. The cubic root of 131223284 is about 508.1636947405.

The spelling of 131223284 in words is "one hundred thirty-one million, two hundred twenty-three thousand, two hundred eighty-four".