159870251 has 2 divisors, whose sum is σ = 159870252. Its totient is φ = 159870250.

The previous prime is 159870211. The next prime is 159870257. The reversal of 159870251 is 152078951.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-159870251 is a prime.

It is not a weakly prime, because it can be changed into another prime (159870257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 79935125 + 79935126.

It is an arithmetic number, because the mean of its divisors is an integer number (79935126).

Almost surely, 2^159870251 is an apocalyptic number.

159870251 is a deficient number, since it is larger than the sum of its proper divisors (1).

159870251 is an equidigital number, since it uses as much as digits as its factorization.

159870251 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25200, while the sum is 38.

The square root of 159870251 is about 12643.9808209282. The cubic root of 159870251 is about 542.7367365624.

The spelling of 159870251 in words is "one hundred fifty-nine million, eight hundred seventy thousand, two hundred fifty-one".