2045553243 has 16 divisors (see below), whose sum is σ = 2885541120. Its totient is φ = 1285363296.

The previous prime is 2045553217. The next prime is 2045553287. The reversal of 2045553243 is 3423555402.

It is a happy number.

It is not a de Polignac number, because 2045553243 - 2⁹ = 2045552731 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2045553143) 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 15 ways as a sum of consecutive naturals, for example, 79855 + ... + 102312.

It is an arithmetic number, because the mean of its divisors is an integer number (180346320).

Almost surely, 2^2045553243 is an apocalyptic number.

2045553243 is a deficient number, since it is larger than the sum of its proper divisors (839987877).

2045553243 is a wasteful number, since it uses less digits than its factorization.

2045553243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182386.

The product of its (nonzero) digits is 72000, while the sum is 33.

The square root of 2045553243 is about 45227.7928159224. The cubic root of 2045553243 is about 1269.4149128763.

The spelling of 2045553243 in words is "two billion, forty-five million, five hundred fifty-three thousand, two hundred forty-three".