2143341521 has 8 divisors (see below), whose sum is σ = 2294921160. Its totient is φ = 1994595328.

The previous prime is 2143341511. The next prime is 2143341527. The reversal of 2143341521 is 1251433412.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 35521600 + 2107819921 = 5960^2 + 45911^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 2143341521 - 2²² = 2139147217 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2143341527) 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, 706796 + ... + 709821.

It is an arithmetic number, because the mean of its divisors is an integer number (286865145).

Almost surely, 2^2143341521 is an apocalyptic number.

It is an amenable number.

2143341521 is a deficient number, since it is larger than the sum of its proper divisors (151579639).

2143341521 is a wasteful number, since it uses less digits than its factorization.

2143341521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1416723.

The product of its digits is 2880, while the sum is 26.

The square root of 2143341521 is about 46296.2365749096. The cubic root of 2143341521 is about 1289.3291227504.

Adding to 2143341521 its reverse (1251433412), we get a palindrome (3394774933).

The spelling of 2143341521 in words is "two billion, one hundred forty-three million, three hundred forty-one thousand, five hundred twenty-one".