2154021244 has 12 divisors (see below), whose sum is σ = 3991274784. Its totient is φ = 1013657024.

The previous prime is 2154021211. The next prime is 2154021251. The reversal of 2154021244 is 4421204512.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15838324 + ... + 15838459.

It is an arithmetic number, because the mean of its divisors is an integer number (332606232).

Almost surely, 2^2154021244 is an apocalyptic number.

It is an amenable number.

2154021244 is a deficient number, since it is larger than the sum of its proper divisors (1837253540).

2154021244 is a wasteful number, since it uses less digits than its factorization.

2154021244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31676804 (or 31676802 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 25.

The square root of 2154021244 is about 46411.4344100675. The cubic root of 2154021244 is about 1291.4670416012.

Adding to 2154021244 its reverse (4421204512), we get a palindrome (6575225756).

The spelling of 2154021244 in words is "two billion, one hundred fifty-four million, twenty-one thousand, two hundred forty-four".