2015873421 has 8 divisors (see below), whose sum is σ = 2727948384. Its totient is φ = 1323857040.

The previous prime is 2015873417. The next prime is 2015873423. The reversal of 2015873421 is 1243785102.

2015873421 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2015873421 - 2² = 2015873417 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2015873423) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5014410 + ... + 5014811.

It is an arithmetic number, because the mean of its divisors is an integer number (340993548).

Almost surely, 2^2015873421 is an apocalyptic number.

It is an amenable number.

2015873421 is a deficient number, since it is larger than the sum of its proper divisors (712074963).

2015873421 is a wasteful number, since it uses less digits than its factorization.

2015873421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10029291.

The product of its (nonzero) digits is 13440, while the sum is 33.

The square root of 2015873421 is about 44898.4790499634. The cubic root of 2015873421 is about 1263.2454798747.

The spelling of 2015873421 in words is "two billion, fifteen million, eight hundred seventy-three thousand, four hundred twenty-one".