2138162421 has 8 divisors (see below), whose sum is σ = 2877038560. Its totient is φ = 1412363952.

The previous prime is 2138162417. The next prime is 2138162441. The reversal of 2138162421 is 1242618312.

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

It is not a de Polignac number, because 2138162421 - 2² = 2138162417 is a prime.

It is a super-3 number, since 3×2138162421³ (a number of 29 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2138162441) 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, 3269035 + ... + 3269688.

It is an arithmetic number, because the mean of its divisors is an integer number (359629820).

Almost surely, 2^2138162421 is an apocalyptic number.

It is an amenable number.

2138162421 is a deficient number, since it is larger than the sum of its proper divisors (738876139).

2138162421 is a wasteful number, since it uses less digits than its factorization.

2138162421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6538835.

The product of its digits is 4608, while the sum is 30.

The square root of 2138162421 is about 46240.2683923872. The cubic root of 2138162421 is about 1288.2897876579.

The spelling of 2138162421 in words is "two billion, one hundred thirty-eight million, one hundred sixty-two thousand, four hundred twenty-one".