243135212554 has 64 divisors (see below), whose sum is σ = 417462958080. Its totient is φ = 105345028800.

The previous prime is 243135212543. The next prime is 243135212599. The reversal of 243135212554 is 455212531342.

It is a happy number.

It is a super-2 number, since 2×243135212554² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 22822129 + ... + 22832779.

It is an arithmetic number, because the mean of its divisors is an integer number (6522858720).

Almost surely, 2^243135212554 is an apocalyptic number.

243135212554 is a deficient number, since it is larger than the sum of its proper divisors (174327745526).

243135212554 is a wasteful number, since it uses less digits than its factorization.

243135212554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11395.

The product of its digits is 144000, while the sum is 37.

Adding to 243135212554 its reverse (455212531342), we get a palindrome (698347743896).

The spelling of 243135212554 in words is "two hundred forty-three billion, one hundred thirty-five million, two hundred twelve thousand, five hundred fifty-four".