551420563 has 4 divisors (see below), whose sum is σ = 551502928. Its totient is φ = 551338200.

The previous prime is 551420537. The next prime is 551420579. The reversal of 551420563 is 365024155.

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

It is a cyclic number.

It is not a de Polignac number, because 551420563 - 2¹⁷ = 551289491 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (551420503) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30156 + ... + 44857.

It is an arithmetic number, because the mean of its divisors is an integer number (137875732).

Almost surely, 2^551420563 is an apocalyptic number.

551420563 is a deficient number, since it is larger than the sum of its proper divisors (82365).

551420563 is an equidigital number, since it uses as much as digits as its factorization.

551420563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82364.

The product of its (nonzero) digits is 18000, while the sum is 31.

The square root of 551420563 is about 23482.3457729419. The cubic root of 551420563 is about 820.0260565783.

The spelling of 551420563 in words is "five hundred fifty-one million, four hundred twenty thousand, five hundred sixty-three".