243225513 has 12 divisors (see below), whose sum is σ = 351585520. Its totient is φ = 162030456.

The previous prime is 243225509. The next prime is 243225547. The reversal of 243225513 is 315522342.

It is a happy number.

It is not a de Polignac number, because 243225513 - 2² = 243225509 is a prime.

It is a super-2 number, since 2×243225513² = 118317300348226338, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (243225413) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3870 + ... + 22392.

Almost surely, 2^243225513 is an apocalyptic number.

It is an amenable number.

243225513 is a deficient number, since it is larger than the sum of its proper divisors (108360007).

243225513 is a wasteful number, since it uses less digits than its factorization.

243225513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19988 (or 19985 counting only the distinct ones).

The product of its digits is 7200, while the sum is 27.

The square root of 243225513 is about 15595.6889235455. The cubic root of 243225513 is about 624.2181267132.

Adding to 243225513 its reverse (315522342), we get a palindrome (558747855).

The spelling of 243225513 in words is "two hundred forty-three million, two hundred twenty-five thousand, five hundred thirteen".