2155677 has 4 divisors (see below), whose sum is σ = 2874240. Its totient is φ = 1437116.

The previous prime is 2155667. The next prime is 2155691. The reversal of 2155677 is 7765512.

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 2155677 - 2⁴ = 2155661 is a prime.

It is a D-number.

2155677 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2155627) 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, 359277 + ... + 359282.

It is an arithmetic number, because the mean of its divisors is an integer number (718560).

2^2155677 is an apocalyptic number.

It is an amenable number.

2155677 is a deficient number, since it is larger than the sum of its proper divisors (718563).

2155677 is an equidigital number, since it uses as much as digits as its factorization.

2155677 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 718562.

The product of its digits is 14700, while the sum is 33.

The square root of 2155677 is about 1468.2223945983. Note that the first 3 decimals coincide. The cubic root of 2155677 is about 129.1797865734.

The spelling of 2155677 in words is "two million, one hundred fifty-five thousand, six hundred seventy-seven".