551222490 has 128 divisors (see below), whose sum is σ = 1714083840. Its totient is φ = 110170368.

The previous prime is 551222453. The next prime is 551222537. The reversal of 551222490 is 94222155.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 46557 + ... + 57183.

It is an arithmetic number, because the mean of its divisors is an integer number (13391280).

Almost surely, 2^551222490 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 551222490, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (857041920).

551222490 is an abundant number, since it is smaller than the sum of its proper divisors (1162861350).

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

551222490 is a wasteful number, since it uses less digits than its factorization.

551222490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10676.

The product of its (nonzero) digits is 7200, while the sum is 30.

The square root of 551222490 is about 23478.1279066283. The cubic root of 551222490 is about 819.9278590114.

The spelling of 551222490 in words is "five hundred fifty-one million, two hundred twenty-two thousand, four hundred ninety".