551226520 has 32 divisors (see below), whose sum is σ = 1335665520. Its totient is φ = 203529600.

The previous prime is 551226517. The next prime is 551226521. The reversal of 551226520 is 25622155.

It is a Smith number, since the sum of its digits (28) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (551226521) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 529506 + ... + 530545.

Almost surely, 2^551226520 is an apocalyptic number.

It is an amenable number.

551226520 is an abundant number, since it is smaller than the sum of its proper divisors (784439000).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

551226520 is a wasteful number, since it uses less digits than its factorization.

551226520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1060075 (or 1060071 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 28.

The square root of 551226520 is about 23478.2137310316. The cubic root of 551226520 is about 819.9298571768.

Adding to 551226520 its reverse (25622155), we get a palindrome (576848675).

The spelling of 551226520 in words is "five hundred fifty-one million, two hundred twenty-six thousand, five hundred twenty".