1056055551 has 4 divisors (see below), whose sum is σ = 1408074072. Its totient is φ = 704037032.

The previous prime is 1056055543. The next prime is 1056055571. The reversal of 1056055551 is 1555506501.

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 1056055551 - 2³ = 1056055543 is a prime.

It is a super-3 number, since 3×1056055551³ (a number of 28 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1056055501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 176009256 + ... + 176009261.

It is an arithmetic number, because the mean of its divisors is an integer number (352018518).

Almost surely, 2^1056055551 is an apocalyptic number.

1056055551 is a deficient number, since it is larger than the sum of its proper divisors (352018521).

1056055551 is an equidigital number, since it uses as much as digits as its factorization.

1056055551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 352018520.

The product of its (nonzero) digits is 18750, while the sum is 33.

The square root of 1056055551 is about 32497.0083392302. The cubic root of 1056055551 is about 1018.3465300507.

It can be divided in two parts, 105605 and 5551, that added together give a triangular number (111156 = T₄₇₁).

The spelling of 1056055551 in words is "one billion, fifty-six million, fifty-five thousand, five hundred fifty-one".