551056530 has 48 divisors (see below), whose sum is σ = 1404930240. Its totient is φ = 138302208.

The previous prime is 551056511. The next prime is 551056537. The reversal of 551056530 is 35650155.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (551056537) 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, 23110 + ... + 40449.

It is an arithmetic number, because the mean of its divisors is an integer number (29269380).

Almost surely, 2^551056530 is an apocalyptic number.

551056530 is an abundant number, since it is smaller than the sum of its proper divisors (853873710).

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

551056530 is a wasteful number, since it uses less digits than its factorization.

551056530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63603 (or 63586 counting only the distinct ones).

The product of its (nonzero) digits is 11250, while the sum is 30.

The square root of 551056530 is about 23474.5932872116. The cubic root of 551056530 is about 819.8455638169.

The spelling of 551056530 in words is "five hundred fifty-one million, fifty-six thousand, five hundred thirty".