210220210157 has 2 divisors, whose sum is σ = 210220210158. Its totient is φ = 210220210156.

The previous prime is 210220210147. The next prime is 210220210177. The reversal of 210220210157 is 751012022012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 138302915881 + 71917294276 = 371891^2 + 268174^2 .

It is a cyclic number.

It is not a de Polignac number, because 210220210157 - 2⁴ = 210220210141 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (210220210147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105110105078 + 105110105079.

It is an arithmetic number, because the mean of its divisors is an integer number (105110105079).

Almost surely, 2^210220210157 is an apocalyptic number.

It is an amenable number.

210220210157 is a deficient number, since it is larger than the sum of its proper divisors (1).

210220210157 is an equidigital number, since it uses as much as digits as its factorization.

210220210157 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 560, while the sum is 23.

Adding to 210220210157 its reverse (751012022012), we get a palindrome (961232232169).

The spelling of 210220210157 in words is "two hundred ten billion, two hundred twenty million, two hundred ten thousand, one hundred fifty-seven".