13409221157 has 2 divisors, whose sum is σ = 13409221158. Its totient is φ = 13409221156.

The previous prime is 13409221129. The next prime is 13409221159. The reversal of 13409221157 is 75112290431.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12294596161 + 1114624996 = 110881^2 + 33386^2 .

It is a cyclic number.

It is not a de Polignac number, because 13409221157 - 2¹² = 13409217061 is a prime.

Together with 13409221159, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13409221159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6704610578 + 6704610579.

It is an arithmetic number, because the mean of its divisors is an integer number (6704610579).

Almost surely, 2^13409221157 is an apocalyptic number.

It is an amenable number.

13409221157 is a deficient number, since it is larger than the sum of its proper divisors (1).

13409221157 is an equidigital number, since it uses as much as digits as its factorization.

13409221157 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15120, while the sum is 35.

The spelling of 13409221157 in words is "thirteen billion, four hundred nine million, two hundred twenty-one thousand, one hundred fifty-seven".