131233144 has 16 divisors (see below), whose sum is σ = 281214000. Its totient is φ = 56242752.

The previous prime is 131233139. The next prime is 131233153. The reversal of 131233144 is 441332131.

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, 1171669 + ... + 1171780.

It is an arithmetic number, because the mean of its divisors is an integer number (17575875).

Almost surely, 2^131233144 is an apocalyptic number.

131233144 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

131233144 is an abundant number, since it is smaller than the sum of its proper divisors (149980856).

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

131233144 is a wasteful number, since it uses less digits than its factorization.

131233144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2343462 (or 2343458 counting only the distinct ones).

The product of its digits is 864, while the sum is 22.

The square root of 131233144 is about 11455.7035576171. The cubic root of 131233144 is about 508.1764220767.

Adding to 131233144 its reverse (441332131), we get a palindrome (572565275).

The spelling of 131233144 in words is "one hundred thirty-one million, two hundred thirty-three thousand, one hundred forty-four".