224521131 has 4 divisors (see below), whose sum is σ = 299361512. Its totient is φ = 149680752.

The previous prime is 224521117. The next prime is 224521139. The reversal of 224521131 is 131125422.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 224521131 - 2⁹ = 224520619 is a prime.

It is a super-2 number, since 2×224521131² = 100819476531038322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 224521098 and 224521107.

It is not an unprimeable number, because it can be changed into a prime (224521139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37420186 + ... + 37420191.

It is an arithmetic number, because the mean of its divisors is an integer number (74840378).

Almost surely, 2^224521131 is an apocalyptic number.

224521131 is a deficient number, since it is larger than the sum of its proper divisors (74840381).

224521131 is an equidigital number, since it uses as much as digits as its factorization.

224521131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74840380.

The product of its digits is 480, while the sum is 21.

The square root of 224521131 is about 14984.0291977826. The cubic root of 224521131 is about 607.7884000432.

Adding to 224521131 its reverse (131125422), we get a palindrome (355646553).

The spelling of 224521131 in words is "two hundred twenty-four million, five hundred twenty-one thousand, one hundred thirty-one".