551235663 has 24 divisors (see below), whose sum is σ = 869356800. Its totient is φ = 333796560.

The previous prime is 551235661. The next prime is 551235673. The reversal of 551235663 is 366532155.

It is not a de Polignac number, because 551235663 - 2¹ = 551235661 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (551235661) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 202888 + ... + 205586.

It is an arithmetic number, because the mean of its divisors is an integer number (36223200).

Almost surely, 2^551235663 is an apocalyptic number.

551235663 is a deficient number, since it is larger than the sum of its proper divisors (318121137).

551235663 is a wasteful number, since it uses less digits than its factorization.

551235663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4779 (or 4776 counting only the distinct ones).

The product of its digits is 81000, while the sum is 36.

The square root of 551235663 is about 23478.4084426522. The cubic root of 551235663 is about 819.9343904476.

The spelling of 551235663 in words is "five hundred fifty-one million, two hundred thirty-five thousand, six hundred sixty-three".