2154223652 has 18 divisors (see below), whose sum is σ = 4385384262. Its totient is φ = 923238624.

The previous prime is 2154223639. The next prime is 2154223699. The reversal of 2154223652 is 2563224512.

It can be written as a sum of positive squares in only one way, i.e., 1712635456 + 441588196 = 41384^2 + 21014^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5495273 + ... + 5495664.

It is an arithmetic number, because the mean of its divisors is an integer number (243632459).

Almost surely, 2^2154223652 is an apocalyptic number.

It is an amenable number.

2154223652 is an abundant number, since it is smaller than the sum of its proper divisors (2231160610).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2154223652 is a wasteful number, since it uses less digits than its factorization.

2154223652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10990955 (or 10990946 counting only the distinct ones).

The product of its digits is 28800, while the sum is 32.

The square root of 2154223652 is about 46413.6149421697. The cubic root of 2154223652 is about 1291.5074923124.

The spelling of 2154223652 in words is "two billion, one hundred fifty-four million, two hundred twenty-three thousand, six hundred fifty-two".