2157995 has 8 divisors (see below), whose sum is σ = 2959584. Its totient is φ = 1479744.

The previous prime is 2157989. The next prime is 2158019. The reversal of 2157995 is 5997512.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2157995 - 2⁸ = 2157739 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30794 + ... + 30863.

It is an arithmetic number, because the mean of its divisors is an integer number (369948).

2^2157995 is an apocalyptic number.

2157995 is a deficient number, since it is larger than the sum of its proper divisors (801589).

2157995 is an equidigital number, since it uses as much as digits as its factorization.

2157995 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61669.

The product of its digits is 28350, while the sum is 38.

The square root of 2157995 is about 1469.0115724527. The cubic root of 2157995 is about 129.2260723390.

The spelling of 2157995 in words is "two million, one hundred fifty-seven thousand, nine hundred ninety-five".