7055551 has 4 divisors (see below), whose sum is σ = 7076232. Its totient is φ = 7034872.

The previous prime is 7055537. The next prime is 7055563. The reversal of 7055551 is 1555507.

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

It is a cyclic number.

It is not a de Polignac number, because 7055551 - 2¹⁷ = 6924479 is a prime.

It is a Duffinian number.

7055551 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7055651) 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, 9820 + ... + 10513.

It is an arithmetic number, because the mean of its divisors is an integer number (1769058).

Almost surely, 2^7055551 is an apocalyptic number.

7055551 is a deficient number, since it is larger than the sum of its proper divisors (20681).

7055551 is a wasteful number, since it uses less digits than its factorization.

7055551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20680.

The product of its (nonzero) digits is 4375, while the sum is 28.

The square root of 7055551 is about 2656.2287175618. The cubic root of 7055551 is about 191.7978105202.

The spelling of 7055551 in words is "seven million, fifty-five thousand, five hundred fifty-one".