2153264226521 has 2 divisors, whose sum is σ = 2153264226522. Its totient is φ = 2153264226520.

The previous prime is 2153264226517. The next prime is 2153264226523. The reversal of 2153264226521 is 1256224623512.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2153262760000 + 1466521 = 1467400^2 + 1211^2 .

It is a cyclic number.

It is not a de Polignac number, because 2153264226521 - 2² = 2153264226517 is a prime.

Together with 2153264226523, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (2153264226523) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1076632113260 + 1076632113261.

It is an arithmetic number, because the mean of its divisors is an integer number (1076632113261).

Almost surely, 2^{2153264226521} is an apocalyptic number.

It is an amenable number.

2153264226521 is a deficient number, since it is larger than the sum of its proper divisors (1).

2153264226521 is an equidigital number, since it uses as much as digits as its factorization.

2153264226521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 345600, while the sum is 41.

The spelling of 2153264226521 in words is "two trillion, one hundred fifty-three billion, two hundred sixty-four million, two hundred twenty-six thousand, five hundred twenty-one".