2152157 has 4 divisors (see below), whose sum is σ = 2459616. Its totient is φ = 1844700.

The previous prime is 2152153. The next prime is 2152159. The reversal of 2152157 is 7512512.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2152157 - 2² = 2152153 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2152153) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 153719 + ... + 153732.

It is an arithmetic number, because the mean of its divisors is an integer number (614904).

2^2152157 is an apocalyptic number.

It is an amenable number.

2152157 is a deficient number, since it is larger than the sum of its proper divisors (307459).

2152157 is an equidigital number, since it uses as much as digits as its factorization.

2152157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 307458.

The product of its digits is 700, while the sum is 23.

The square root of 2152157 is about 1467.0231763677. The cubic root of 2152157 is about 129.1094358092.

Adding to 2152157 its reverse (7512512), we get a palindrome (9664669).

The spelling of 2152157 in words is "two million, one hundred fifty-two thousand, one hundred fifty-seven".