2055121513 has 4 divisors (see below), whose sum is σ = 2055480388. Its totient is φ = 2054762640.

The previous prime is 2055121469. The next prime is 2055121547. The reversal of 2055121513 is 3151215502.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1244466729 + 810654784 = 35277^2 + 28472^2 .

It is a cyclic number.

It is not a de Polignac number, because 2055121513 - 2²¹ = 2053024361 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2055121613) 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, 170706 + ... + 182347.

It is an arithmetic number, because the mean of its divisors is an integer number (513870097).

Almost surely, 2^2055121513 is an apocalyptic number.

It is an amenable number.

2055121513 is a deficient number, since it is larger than the sum of its proper divisors (358875).

2055121513 is an equidigital number, since it uses as much as digits as its factorization.

2055121513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 358874.

The product of its (nonzero) digits is 1500, while the sum is 25.

The square root of 2055121513 is about 45333.4480599038. The cubic root of 2055121513 is about 1271.3911044917.

It can be divided in two parts, 205512 and 1513, that added together give a square (207025 = 455²).

The spelling of 2055121513 in words is "two billion, fifty-five million, one hundred twenty-one thousand, five hundred thirteen".