551990429 has 4 divisors (see below), whose sum is σ = 552071100. Its totient is φ = 551909760.

The previous prime is 551990407. The next prime is 551990443. The reversal of 551990429 is 924099155.

551990429 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 234794329 + 317196100 = 15323^2 + 17810^2 .

It is a cyclic number.

It is not a de Polignac number, because 551990429 - 2²⁴ = 535213213 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 551990429.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (551990129) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29012 + ... + 44109.

It is an arithmetic number, because the mean of its divisors is an integer number (138017775).

Almost surely, 2^551990429 is an apocalyptic number.

It is an amenable number.

551990429 is a deficient number, since it is larger than the sum of its proper divisors (80671).

551990429 is an equidigital number, since it uses as much as digits as its factorization.

551990429 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80670.

The product of its (nonzero) digits is 145800, while the sum is 44.

The square root of 551990429 is about 23494.4765636521. The cubic root of 551990429 is about 820.3084448397.

The spelling of 551990429 in words is "five hundred fifty-one million, nine hundred ninety thousand, four hundred twenty-nine".