551391290 has 16 divisors (see below), whose sum is σ = 992832768. Its totient is φ = 220483536.

The previous prime is 551391283. The next prime is 551391299. The reversal of 551391290 is 92193155.

It is a self number, because there is not a number n which added to its sum of digits gives 551391290.

It is not an unprimeable number, because it can be changed into a prime (551391299) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31019 + ... + 45441.

It is an arithmetic number, because the mean of its divisors is an integer number (62052048).

Almost surely, 2^551391290 is an apocalyptic number.

551391290 is a deficient number, since it is larger than the sum of its proper divisors (441441478).

551391290 is a wasteful number, since it uses less digits than its factorization.

551391290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18253.

The product of its (nonzero) digits is 12150, while the sum is 35.

The square root of 551391290 is about 23481.7224666335. The cubic root of 551391290 is about 820.0115455444.

The spelling of 551391290 in words is "five hundred fifty-one million, three hundred ninety-one thousand, two hundred ninety".