7153268921 has 2 divisors, whose sum is σ = 7153268922. Its totient is φ = 7153268920.

The previous prime is 7153268887. The next prime is 7153268923. The reversal of 7153268921 is 1298623517.

7153268921 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6285318400 + 867950521 = 79280^2 + 29461^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7153268921 is a prime.

It is a super-2 number, since 2×7153268921² (a number of 21 digits) contains 22 as substring.

Together with 7153268923, 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 (7153268923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3576634460 + 3576634461.

It is an arithmetic number, because the mean of its divisors is an integer number (3576634461).

Almost surely, 2^7153268921 is an apocalyptic number.

It is an amenable number.

7153268921 is a deficient number, since it is larger than the sum of its proper divisors (1).

7153268921 is an equidigital number, since it uses as much as digits as its factorization.

7153268921 is an evil number, because the sum of its binary digits is even.

The product of its digits is 181440, while the sum is 44.

The square root of 7153268921 is about 84576.9999527058. Note that the first 4 decimals coincide. The cubic root of 7153268921 is about 1926.7920722954.

The spelling of 7153268921 in words is "seven billion, one hundred fifty-three million, two hundred sixty-eight thousand, nine hundred twenty-one".