162221703251 has 2 divisors, whose sum is σ = 162221703252. Its totient is φ = 162221703250.

The previous prime is 162221703233. The next prime is 162221703253. The reversal of 162221703251 is 152307122261.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-162221703251 is a prime.

Together with 162221703253, 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 (162221703253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81110851625 + 81110851626.

It is an arithmetic number, because the mean of its divisors is an integer number (81110851626).

Almost surely, 2^162221703251 is an apocalyptic number.

162221703251 is a deficient number, since it is larger than the sum of its proper divisors (1).

162221703251 is an equidigital number, since it uses as much as digits as its factorization.

162221703251 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10080, while the sum is 32.

The spelling of 162221703251 in words is "one hundred sixty-two billion, two hundred twenty-one million, seven hundred three thousand, two hundred fifty-one".