2056513551 has 4 divisors (see below), whose sum is σ = 2742018072. Its totient is φ = 1371009032.

The previous prime is 2056513549. The next prime is 2056513567. The reversal of 2056513551 is 1553156502.

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 2056513551 - 2¹ = 2056513549 is a prime.

It is a super-3 number, since 3×2056513551³ (a number of 29 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2056513351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 342752256 + ... + 342752261.

It is an arithmetic number, because the mean of its divisors is an integer number (685504518).

Almost surely, 2^2056513551 is an apocalyptic number.

2056513551 is a deficient number, since it is larger than the sum of its proper divisors (685504521).

2056513551 is an equidigital number, since it uses as much as digits as its factorization.

2056513551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 685504520.

The product of its (nonzero) digits is 22500, while the sum is 33.

The square root of 2056513551 is about 45348.7987823272. The cubic root of 2056513551 is about 1271.6780989219.

The spelling of 2056513551 in words is "two billion, fifty-six million, five hundred thirteen thousand, five hundred fifty-one".