551420244 has 48 divisors (see below), whose sum is σ = 1436848000. Its totient is φ = 182875968.

The previous prime is 551420197. The next prime is 551420249. The reversal of 551420244 is 442024155.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (551420249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8664 + ... + 34320.

Almost surely, 2^551420244 is an apocalyptic number.

551420244 is a gapful number since it is divisible by the number (54) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 551420244, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (718424000).

551420244 is an abundant number, since it is smaller than the sum of its proper divisors (885427756).

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

551420244 is a wasteful number, since it uses less digits than its factorization.

551420244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25869 (or 25861 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 27.

The square root of 551420244 is about 23482.3389806041. The cubic root of 551420244 is about 820.0258984483.

Adding to 551420244 its reverse (442024155), we get a palindrome (993444399).

The spelling of 551420244 in words is "five hundred fifty-one million, four hundred twenty thousand, two hundred forty-four".