243122045554 has 4 divisors (see below), whose sum is σ = 364683068334. Its totient is φ = 121561022776.

The previous prime is 243122045533. The next prime is 243122045557. The reversal of 243122045554 is 455540221342.

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

It can be written as a sum of positive squares in only one way, i.e., 236161981225 + 6960064329 = 485965^2 + 83427^2 .

It is a super-2 number, since 2×243122045554² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (243122045557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60780511387 + ... + 60780511390.

Almost surely, 2^243122045554 is an apocalyptic number.

243122045554 is a deficient number, since it is larger than the sum of its proper divisors (121561022780).

243122045554 is a wasteful number, since it uses less digits than its factorization.

243122045554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121561022779.

The product of its (nonzero) digits is 192000, while the sum is 37.

Adding to 243122045554 its reverse (455540221342), we get a palindrome (698662266896).

The spelling of 243122045554 in words is "two hundred forty-three billion, one hundred twenty-two million, forty-five thousand, five hundred fifty-four".