551665226 has 24 divisors (see below), whose sum is σ = 983088576. Its totient is φ = 231395640.

The previous prime is 551665211. The next prime is 551665229. The reversal of 551665226 is 622566155.

It is a happy number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 551665226.

It is not an unprimeable number, because it can be changed into a prime (551665229) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 55280 + ... + 64491.

It is an arithmetic number, because the mean of its divisors is an integer number (40962024).

Almost surely, 2^551665226 is an apocalyptic number.

551665226 is a deficient number, since it is larger than the sum of its proper divisors (431423350).

551665226 is a wasteful number, since it uses less digits than its factorization.

551665226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119834 (or 119827 counting only the distinct ones).

The product of its digits is 108000, while the sum is 38.

The square root of 551665226 is about 23487.5547045664. The cubic root of 551665226 is about 820.1473193572.

The spelling of 551665226 in words is "five hundred fifty-one million, six hundred sixty-five thousand, two hundred twenty-six".