2003315421 has 16 divisors (see below), whose sum is σ = 2722690880. Its totient is φ = 1309944960.

The previous prime is 2003315393. The next prime is 2003315429. The reversal of 2003315421 is 1245133002.

It is not a de Polignac number, because 2003315421 - 2⁹ = 2003314909 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2003315429) 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, 14370 + ... + 64908.

It is an arithmetic number, because the mean of its divisors is an integer number (170168180).

Almost surely, 2^2003315421 is an apocalyptic number.

It is an amenable number.

2003315421 is a deficient number, since it is larger than the sum of its proper divisors (719375459).

2003315421 is a wasteful number, since it uses less digits than its factorization.

2003315421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50796.

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

The square root of 2003315421 is about 44758.4117345556. The cubic root of 2003315421 is about 1260.6168603368.

Adding to 2003315421 its reverse (1245133002), we get a palindrome (3248448423).

The spelling of 2003315421 in words is "two billion, three million, three hundred fifteen thousand, four hundred twenty-one".