551053421 has 4 divisors (see below), whose sum is σ = 558602172. Its totient is φ = 543504672.

The previous prime is 551053397. The next prime is 551053423. The reversal of 551053421 is 124350155.

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 323496196 + 227557225 = 17986^2 + 15085^2 .

It is a cyclic number.

It is not a de Polignac number, because 551053421 - 2⁶ = 551053357 is a prime.

It is a super-5 number, since 5×551053421⁵ (a number of 45 digits) contains 55555 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (551053423) 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 3 ways as a sum of consecutive naturals, for example, 3774266 + ... + 3774411.

It is an arithmetic number, because the mean of its divisors is an integer number (139650543).

Almost surely, 2^551053421 is an apocalyptic number.

It is an amenable number.

551053421 is a deficient number, since it is larger than the sum of its proper divisors (7548751).

551053421 is an equidigital number, since it uses as much as digits as its factorization.

551053421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7548750.

The product of its (nonzero) digits is 3000, while the sum is 26.

The square root of 551053421 is about 23474.5270665886. The cubic root of 551053421 is about 819.8440219880.

The spelling of 551053421 in words is "five hundred fifty-one million, fifty-three thousand, four hundred twenty-one".