131542224 has 40 divisors (see below), whose sum is σ = 370711392. Its totient is φ = 39861120.

The previous prime is 131542223. The next prime is 131542249. The reversal of 131542224 is 422245131.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a junction number, because it is equal to n+sod(n) for n = 131542194 and 131542203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131542223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 124039 + ... + 125094.

Almost surely, 2^131542224 is an apocalyptic number.

It is an amenable number.

131542224 is an abundant number, since it is smaller than the sum of its proper divisors (239169168).

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

131542224 is a wasteful number, since it uses less digits than its factorization.

131542224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 249155 (or 249149 counting only the distinct ones).

The product of its digits is 1920, while the sum is 24.

The square root of 131542224 is about 11469.1858473041. The cubic root of 131542224 is about 508.5750612638.

Adding to 131542224 its reverse (422245131), we get a palindrome (553787355).

The spelling of 131542224 in words is "one hundred thirty-one million, five hundred forty-two thousand, two hundred twenty-four".