2157226020659 has 2 divisors, whose sum is σ = 2157226020660. Its totient is φ = 2157226020658.

The previous prime is 2157226020583. The next prime is 2157226020661. The reversal of 2157226020659 is 9560206227512.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2157226020659 - 2²⁸ = 2156957585203 is a prime.

It is a super-4 number, since 4×2157226020659⁴ (a number of 50 digits) contains 4444 as substring.

Together with 2157226020661, 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 (2157226020679) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1078613010329 + 1078613010330.

It is an arithmetic number, because the mean of its divisors is an integer number (1078613010330).

Almost surely, 2^{2157226020659} is an apocalyptic number.

2157226020659 is a deficient number, since it is larger than the sum of its proper divisors (1).

2157226020659 is an equidigital number, since it uses as much as digits as its factorization.

2157226020659 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 907200, while the sum is 47.

The spelling of 2157226020659 in words is "two trillion, one hundred fifty-seven billion, two hundred twenty-six million, twenty thousand, six hundred fifty-nine".