243115222351 has 16 divisors (see below), whose sum is σ = 251979724800. Its totient is φ = 234411687328.

The previous prime is 243115222349. The next prime is 243115222367. The reversal of 243115222351 is 153222511342.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 243115222351 - 2¹ = 243115222349 is a prime.

It is a super-2 number, since 2×243115222351² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243115222951) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11769090 + ... + 11789728.

It is an arithmetic number, because the mean of its divisors is an integer number (15748732800).

Almost surely, 2^243115222351 is an apocalyptic number.

243115222351 is a deficient number, since it is larger than the sum of its proper divisors (8864502449).

243115222351 is a wasteful number, since it uses less digits than its factorization.

243115222351 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24518.

The product of its digits is 14400, while the sum is 31.

Adding to 243115222351 its reverse (153222511342), we get a palindrome (396337733693).

The spelling of 243115222351 in words is "two hundred forty-three billion, one hundred fifteen million, two hundred twenty-two thousand, three hundred fifty-one".