2152021523 has 2 divisors, whose sum is σ = 2152021524. Its totient is φ = 2152021522.

The previous prime is 2152021507. The next prime is 2152021549. The reversal of 2152021523 is 3251202512.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2152021523 - 2⁴ = 2152021507 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (2152021723) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1076010761 + 1076010762.

It is an arithmetic number, because the mean of its divisors is an integer number (1076010762).

Almost surely, 2^2152021523 is an apocalyptic number.

2152021523 is a deficient number, since it is larger than the sum of its proper divisors (1).

2152021523 is an equidigital number, since it uses as much as digits as its factorization.

2152021523 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 2152021523 is about 46389.8859989977. The cubic root of 2152021523 is about 1291.0672663166.

The spelling of 2152021523 in words is "two billion, one hundred fifty-two million, twenty-one thousand, five hundred twenty-three".