551628445 has 8 divisors (see below), whose sum is σ = 666786744. Its totient is φ = 438081024.

The previous prime is 551628431. The next prime is 551628457. The reversal of 551628445 is 544826155.

551628445 = T₂₇₆₉ + T₂₇₇₀ + ... + T₂₉₀₅.

It can be written as a sum of positive squares in 4 ways, for example, as 133957476 + 417670969 = 11574^2 + 20437^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 551628445 - 2⁷ = 551628317 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 551628398 and 551628407.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 401964 + ... + 403333.

It is an arithmetic number, because the mean of its divisors is an integer number (83348343).

Almost surely, 2^551628445 is an apocalyptic number.

It is an amenable number.

551628445 is a deficient number, since it is larger than the sum of its proper divisors (115158299).

551628445 is a wasteful number, since it uses less digits than its factorization.

551628445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 805439.

The product of its digits is 192000, while the sum is 40.

The square root of 551628445 is about 23486.7717023860. The cubic root of 551628445 is about 820.1290918118.

The spelling of 551628445 in words is "five hundred fifty-one million, six hundred twenty-eight thousand, four hundred forty-five".