243123454442 has 16 divisors (see below), whose sum is σ = 397855952064. Its totient is φ = 110505780000.

The previous prime is 243123454433. The next prime is 243123454459. The reversal of 243123454442 is 244454321342.

It is a super-2 number, since 2×243123454442² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 243123454396 and 243123454405.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 291467 + ... + 755777.

It is an arithmetic number, because the mean of its divisors is an integer number (24865997004).

Almost surely, 2^243123454442 is an apocalyptic number.

243123454442 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

243123454442 is a deficient number, since it is larger than the sum of its proper divisors (154732497622).

243123454442 is a wasteful number, since it uses less digits than its factorization.

243123454442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 488125.

The product of its digits is 368640, while the sum is 38.

Adding to 243123454442 its reverse (244454321342), we get a palindrome (487577775784).

The spelling of 243123454442 in words is "two hundred forty-three billion, one hundred twenty-three million, four hundred fifty-four thousand, four hundred forty-two".