157930217 has 2 divisors, whose sum is σ = 157930218. Its totient is φ = 157930216.

The previous prime is 157930183. The next prime is 157930229. The reversal of 157930217 is 712039751.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 110334016 + 47596201 = 10504^2 + 6899^2 .

It is a cyclic number.

It is not a de Polignac number, because 157930217 - 2¹⁰ = 157929193 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (157930247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78965108 + 78965109.

It is an arithmetic number, because the mean of its divisors is an integer number (78965109).

Almost surely, 2^157930217 is an apocalyptic number.

It is an amenable number.

157930217 is a deficient number, since it is larger than the sum of its proper divisors (1).

157930217 is an equidigital number, since it uses as much as digits as its factorization.

157930217 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13230, while the sum is 35.

The square root of 157930217 is about 12567.0289647156. The cubic root of 157930217 is about 540.5324161324.

Adding to 157930217 its reverse (712039751), we get a palindrome (869969968).

The spelling of 157930217 in words is "one hundred fifty-seven million, nine hundred thirty thousand, two hundred seventeen".