551450620 has 48 divisors (see below), whose sum is σ = 1335660480. Its totient is φ = 187329024.

The previous prime is 551450617. The next prime is 551450629. The reversal of 551450620 is 26054155.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (551450629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2809 + ... + 33328.

It is an arithmetic number, because the mean of its divisors is an integer number (27826260).

Almost surely, 2^551450620 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 551450620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (667830240).

551450620 is an abundant number, since it is smaller than the sum of its proper divisors (784209860).

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

551450620 is a wasteful number, since it uses less digits than its factorization.

551450620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36262 (or 36260 counting only the distinct ones).

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

The square root of 551450620 is about 23482.9857556487. The cubic root of 551450620 is about 820.0409557176.

The spelling of 551450620 in words is "five hundred fifty-one million, four hundred fifty thousand, six hundred twenty".