2154021303 has 16 divisors (see below), whose sum is σ = 3283867136. Its totient is φ = 1230288480.

The previous prime is 2154021299. The next prime is 2154021319. The reversal of 2154021303 is 3031204512.

It is not a de Polignac number, because 2154021303 - 2² = 2154021299 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2154021303.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2154021503) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23550 + ... + 69732.

It is an arithmetic number, because the mean of its divisors is an integer number (205241696).

Almost surely, 2^2154021303 is an apocalyptic number.

2154021303 is a deficient number, since it is larger than the sum of its proper divisors (1129845833).

2154021303 is a wasteful number, since it uses less digits than its factorization.

2154021303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48414.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 2154021303 is about 46411.4350456867. The cubic root of 2154021303 is about 1291.4670533926.

Adding to 2154021303 its reverse (3031204512), we get a palindrome (5185225815).

The spelling of 2154021303 in words is "two billion, one hundred fifty-four million, twenty-one thousand, three hundred three".