2145554223 has 4 divisors (see below), whose sum is σ = 2860738968. Its totient is φ = 1430369480.

The previous prime is 2145554221. The next prime is 2145554249. The reversal of 2145554223 is 3224555412.

It is a happy number.

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 2145554223 - 2¹ = 2145554221 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2145554221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 357592368 + ... + 357592373.

It is an arithmetic number, because the mean of its divisors is an integer number (715184742).

Almost surely, 2^2145554223 is an apocalyptic number.

2145554223 is a deficient number, since it is larger than the sum of its proper divisors (715184745).

2145554223 is an equidigital number, since it uses as much as digits as its factorization.

2145554223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 715184744.

The product of its digits is 48000, while the sum is 33.

The square root of 2145554223 is about 46320.1276228812. The cubic root of 2145554223 is about 1289.7726544853.

The spelling of 2145554223 in words is "two billion, one hundred forty-five million, five hundred fifty-four thousand, two hundred twenty-three".