2152213921 has 8 divisors (see below), whose sum is σ = 2528475264. Its totient is φ = 1806053520.

The previous prime is 2152213913. The next prime is 2152213963. The reversal of 2152213921 is 1293122512.

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 2152213921 - 2³ = 2152213913 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2152213921.

It is not an unprimeable number, because it can be changed into a prime (2152213321) 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, 7525081 + ... + 7525366.

It is an arithmetic number, because the mean of its divisors is an integer number (316059408).

Almost surely, 2^2152213921 is an apocalyptic number.

It is an amenable number.

2152213921 is a deficient number, since it is larger than the sum of its proper divisors (376261343).

2152213921 is a wasteful number, since it uses less digits than its factorization.

2152213921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15050471.

The product of its digits is 2160, while the sum is 28.

The square root of 2152213921 is about 46391.9596589754. The cubic root of 2152213921 is about 1291.1057404296.

The spelling of 2152213921 in words is "two billion, one hundred fifty-two million, two hundred thirteen thousand, nine hundred twenty-one".