2152914921 has 24 divisors (see below), whose sum is σ = 3143352576. Its totient is φ = 1419858720.

The previous prime is 2152914913. The next prime is 2152914941. The reversal of 2152914921 is 1294192512.

2152914921 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2152914921 - 2³ = 2152914913 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2152914941) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 323851 + ... + 330431.

It is an arithmetic number, because the mean of its divisors is an integer number (130973024).

Almost surely, 2^2152914921 is an apocalyptic number.

It is an amenable number.

2152914921 is a deficient number, since it is larger than the sum of its proper divisors (990437655).

2152914921 is a wasteful number, since it uses less digits than its factorization.

2152914921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6973 (or 6970 counting only the distinct ones).

The product of its digits is 12960, while the sum is 36.

The square root of 2152914921 is about 46399.5142323710. The cubic root of 2152914921 is about 1291.2459010443.

The spelling of 2152914921 in words is "two billion, one hundred fifty-two million, nine hundred fourteen thousand, nine hundred twenty-one".