243214054551 has 48 divisors (see below), whose sum is σ = 389802172032. Its totient is φ = 145175155200.

The previous prime is 243214054543. The next prime is 243214054591. The reversal of 243214054551 is 155450412342.

243214054551 is a `hidden beast` number, since 2 + 4 + 3 + 21 + 40 + 545 + 51 = 666.

It is not a de Polignac number, because 243214054551 - 2³ = 243214054543 is a prime.

It is a super-2 number, since 2×243214054551² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243214054511) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 683346 + ... + 976416.

It is an arithmetic number, because the mean of its divisors is an integer number (8120878584).

Almost surely, 2^243214054551 is an apocalyptic number.

243214054551 is a deficient number, since it is larger than the sum of its proper divisors (146588117481).

243214054551 is a wasteful number, since it uses less digits than its factorization.

243214054551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 293304 (or 293301 counting only the distinct ones).

The product of its (nonzero) digits is 96000, while the sum is 36.

Adding to 243214054551 its reverse (155450412342), we get a palindrome (398664466893).

The spelling of 243214054551 in words is "two hundred forty-three billion, two hundred fourteen million, fifty-four thousand, five hundred fifty-one".