2056551 has 8 divisors (see below), whose sum is σ = 3133824. Its totient is φ = 1175160.

The previous prime is 2056547. The next prime is 2056553. The reversal of 2056551 is 1556502.

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

It is not a de Polignac number, because 2056551 - 2² = 2056547 is a prime.

2056551 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2056553) 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 7 ways as a sum of consecutive naturals, for example, 48945 + ... + 48986.

It is an arithmetic number, because the mean of its divisors is an integer number (391728).

2^2056551 is an apocalyptic number.

2056551 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

2056551 is a deficient number, since it is larger than the sum of its proper divisors (1077273).

2056551 is an equidigital number, since it uses as much as digits as its factorization.

2056551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97941.

The product of its (nonzero) digits is 1500, while the sum is 24.

The square root of 2056551 is about 1434.0679900200. The cubic root of 2056551 is about 127.1685817938.

The spelling of 2056551 in words is "two million, fifty-six thousand, five hundred fifty-one".