857220151 has 2 divisors, whose sum is σ = 857220152. Its totient is φ = 857220150.

The previous prime is 857220149. The next prime is 857220187. The reversal of 857220151 is 151022758.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 857220151 - 2¹ = 857220149 is a prime.

Together with 857220149, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (857220191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 428610075 + 428610076.

It is an arithmetic number, because the mean of its divisors is an integer number (428610076).

Almost surely, 2^857220151 is an apocalyptic number.

857220151 is a deficient number, since it is larger than the sum of its proper divisors (1).

857220151 is an equidigital number, since it uses as much as digits as its factorization.

857220151 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5600, while the sum is 31.

The square root of 857220151 is about 29278.3222026126. The cubic root of 857220151 is about 949.9428039434.

The spelling of 857220151 in words is "eight hundred fifty-seven million, two hundred twenty thousand, one hundred fifty-one".