2157151 has 2 divisors, whose sum is σ = 2157152. Its totient is φ = 2157150.

The previous prime is 2157149. The next prime is 2157157. The reversal of 2157151 is 1517512.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2157151 - 2¹ = 2157149 is a prime.

Together with 2157149, 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 (2157157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1078575 + 1078576.

It is an arithmetic number, because the mean of its divisors is an integer number (1078576).

2^2157151 is an apocalyptic number.

2157151 is a deficient number, since it is larger than the sum of its proper divisors (1).

2157151 is an equidigital number, since it uses as much as digits as its factorization.

2157151 is an evil number, because the sum of its binary digits is even.

The product of its digits is 350, while the sum is 22.

The square root of 2157151 is about 1468.7242763705. The cubic root of 2157151 is about 129.2092232071.

The spelling of 2157151 in words is "two million, one hundred fifty-seven thousand, one hundred fifty-one".