2155097 has 4 divisors (see below), whose sum is σ = 2462976. Its totient is φ = 1847220.

The previous prime is 2155079. The next prime is 2155103. The reversal of 2155097 is 7905512.

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 2155097 - 2¹² = 2151001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2155007) 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, 153929 + ... + 153942.

It is an arithmetic number, because the mean of its divisors is an integer number (615744).

2^2155097 is an apocalyptic number.

It is an amenable number.

2155097 is a deficient number, since it is larger than the sum of its proper divisors (307879).

2155097 is an equidigital number, since it uses as much as digits as its factorization.

2155097 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 307878.

The product of its (nonzero) digits is 3150, while the sum is 29.

The square root of 2155097 is about 1468.0248635497. The cubic root of 2155097 is about 129.1681999587.

The spelling of 2155097 in words is "two million, one hundred fifty-five thousand, ninety-seven".