551236550443 has 36 divisors (see below), whose sum is σ = 589408214920. Its totient is φ = 515487443328.

The previous prime is 551236550369. The next prime is 551236550503. The reversal of 551236550443 is 344055632155.

It is not a de Polignac number, because 551236550443 - 2²¹ = 551234453291 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 551236550443.

It is not an unprimeable number, because it can be changed into a prime (551236551443) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 607757596 + ... + 607758502.

Almost surely, 2^551236550443 is an apocalyptic number.

551236550443 is a gapful number since it is divisible by the number (53) formed by its first and last digit.

551236550443 is a deficient number, since it is larger than the sum of its proper divisors (38171664477).

551236550443 is an equidigital number, since it uses as much as digits as its factorization.

551236550443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1468 (or 1392 counting only the distinct ones).

The product of its (nonzero) digits is 1080000, while the sum is 43.

The spelling of 551236550443 in words is "five hundred fifty-one billion, two hundred thirty-six million, five hundred fifty thousand, four hundred forty-three".