2154040403 has 12 divisors (see below), whose sum is σ = 2303605200. Its totient is φ = 2013685632.

The previous prime is 2154040397. The next prime is 2154040417. The reversal of 2154040403 is 3040404512.

It is not a de Polignac number, because 2154040403 - 2²² = 2149846099 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2154040003) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18050 + ... + 68072.

It is an arithmetic number, because the mean of its divisors is an integer number (191967100).

Almost surely, 2^2154040403 is an apocalyptic number.

2154040403 is a deficient number, since it is larger than the sum of its proper divisors (149564797).

2154040403 is a wasteful number, since it uses less digits than its factorization.

2154040403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50206 (or 50189 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 2154040403 is about 46411.6408134856. The cubic root of 2154040403 is about 1291.4708705860.

Adding to 2154040403 its reverse (3040404512), we get a palindrome (5194444915).

The spelling of 2154040403 in words is "two billion, one hundred fifty-four million, forty thousand, four hundred three".