2159251 has 2 divisors, whose sum is σ = 2159252. Its totient is φ = 2159250.

The previous prime is 2159249. The next prime is 2159281. The reversal of 2159251 is 1529512.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2159251 - 2¹ = 2159249 is a prime.

Together with 2159249, it forms a pair of twin primes.

2159251 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (2159231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1079625 + 1079626.

It is an arithmetic number, because the mean of its divisors is an integer number (1079626).

2^2159251 is an apocalyptic number.

2159251 is a deficient number, since it is larger than the sum of its proper divisors (1).

2159251 is an equidigital number, since it uses as much as digits as its factorization.

2159251 is an evil number, because the sum of its binary digits is even.

The product of its digits is 900, while the sum is 25.

The square root of 2159251 is about 1469.4390086016. The cubic root of 2159251 is about 129.2511382710.

The spelling of 2159251 in words is "two million, one hundred fifty-nine thousand, two hundred fifty-one".