2013431421 has 4 divisors (see below), whose sum is σ = 2684575232. Its totient is φ = 1342287612.

The previous prime is 2013431417. The next prime is 2013431429. The reversal of 2013431421 is 1241343102.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 2013431421 - 2² = 2013431417 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2013431429) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 335571901 + ... + 335571906.

It is an arithmetic number, because the mean of its divisors is an integer number (671143808).

Almost surely, 2^2013431421 is an apocalyptic number.

It is an amenable number.

2013431421 is a deficient number, since it is larger than the sum of its proper divisors (671143811).

2013431421 is an equidigital number, since it uses as much as digits as its factorization.

2013431421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 671143810.

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 2013431421 is about 44871.2761240418. The cubic root of 2013431421 is about 1262.7351813089.

Adding to 2013431421 its reverse (1241343102), we get a palindrome (3254774523).

The spelling of 2013431421 in words is "two billion, thirteen million, four hundred thirty-one thousand, four hundred twenty-one".