2157329 has 2 divisors, whose sum is σ = 2157330. Its totient is φ = 2157328.

The previous prime is 2157319. The next prime is 2157341. The reversal of 2157329 is 9237512.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1106704 + 1050625 = 1052^2 + 1025^2 .

It is a cyclic number.

It is not a de Polignac number, because 2157329 - 2⁴ = 2157313 is a prime.

It is a d-powerful number, because it can be written as 2¹¹ + 1 + 5⁹ + 7⁵ + 3¹¹ + 2¹³ + 9 .

It is not a weakly prime, because it can be changed into another prime (2157319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1078664 + 1078665.

It is an arithmetic number, because the mean of its divisors is an integer number (1078665).

2^2157329 is an apocalyptic number.

It is an amenable number.

2157329 is a deficient number, since it is larger than the sum of its proper divisors (1).

2157329 is an equidigital number, since it uses as much as digits as its factorization.

2157329 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3780, while the sum is 29.

The square root of 2157329 is about 1468.7848719265. The cubic root of 2157329 is about 129.2127770626.

The spelling of 2157329 in words is "two million, one hundred fifty-seven thousand, three hundred twenty-nine".