2152464221 has 2 divisors, whose sum is σ = 2152464222. Its totient is φ = 2152464220.

The previous prime is 2152464173. The next prime is 2152464253. The reversal of 2152464221 is 1224642512.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1996838596 + 155625625 = 44686^2 + 12475^2 .

It is a cyclic number.

It is not a de Polignac number, because 2152464221 - 2⁶ = 2152464157 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2152464271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1076232110 + 1076232111.

It is an arithmetic number, because the mean of its divisors is an integer number (1076232111).

Almost surely, 2^2152464221 is an apocalyptic number.

It is an amenable number.

2152464221 is a deficient number, since it is larger than the sum of its proper divisors (1).

2152464221 is an equidigital number, since it uses as much as digits as its factorization.

2152464221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7680, while the sum is 29.

The square root of 2152464221 is about 46394.6572462821. The cubic root of 2152464221 is about 1291.1557898595.

The spelling of 2152464221 in words is "two billion, one hundred fifty-two million, four hundred sixty-four thousand, two hundred twenty-one".