551779443 has 6 divisors (see below), whose sum is σ = 797014764. Its totient is φ = 367852956.

The previous prime is 551779427. The next prime is 551779457. The reversal of 551779443 is 344977155.

551779443 is a `hidden beast` number, since 5 + 517 + 7 + 94 + 43 = 666.

It is not a de Polignac number, because 551779443 - 2⁴ = 551779427 is a prime.

It is not an unprimeable number, because it can be changed into a prime (551779643) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 30654405 + ... + 30654422.

It is an arithmetic number, because the mean of its divisors is an integer number (132835794).

Almost surely, 2^551779443 is an apocalyptic number.

551779443 is a deficient number, since it is larger than the sum of its proper divisors (245235321).

551779443 is a wasteful number, since it uses less digits than its factorization.

551779443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61308833 (or 61308830 counting only the distinct ones).

The product of its digits is 529200, while the sum is 45.

The square root of 551779443 is about 23489.9860153215. The cubic root of 551779443 is about 820.2039166666.

It can be divided in two parts, 55177 and 9443, that added together give a triangular number (64620 = T₃₅₉).

The spelling of 551779443 in words is "five hundred fifty-one million, seven hundred seventy-nine thousand, four hundred forty-three".