2129503345 has 4 divisors (see below), whose sum is σ = 2555404020. Its totient is φ = 1703602672.

The previous prime is 2129503303. The next prime is 2129503399. The reversal of 2129503345 is 5433059212.

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 970509409 + 1158993936 = 31153^2 + 34044^2 .

It is a cyclic number.

It is not a de Polignac number, because 2129503345 - 2²⁵ = 2095948913 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2129503345.

It is an unprimeable number.

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, 212950330 + ... + 212950339.

It is an arithmetic number, because the mean of its divisors is an integer number (638851005).

Almost surely, 2^2129503345 is an apocalyptic number.

It is an amenable number.

2129503345 is a deficient number, since it is larger than the sum of its proper divisors (425900675).

2129503345 is an equidigital number, since it uses as much as digits as its factorization.

2129503345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 425900674.

The product of its (nonzero) digits is 32400, while the sum is 34.

The square root of 2129503345 is about 46146.5420698019. The cubic root of 2129503345 is about 1286.5483402675.

The spelling of 2129503345 in words is "two billion, one hundred twenty-nine million, five hundred three thousand, three hundred forty-five".