2159655 has 8 divisors (see below), whose sum is σ = 3455472. Its totient is φ = 1151808.

The previous prime is 2159639. The next prime is 2159669. The reversal of 2159655 is 5569512.

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

It is not a de Polignac number, because 2159655 - 2⁴ = 2159639 is a prime.

It is a congruent 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, 71974 + ... + 72003.

It is an arithmetic number, because the mean of its divisors is an integer number (431934).

2^2159655 is an apocalyptic number.

2159655 is a deficient number, since it is larger than the sum of its proper divisors (1295817).

2159655 is a wasteful number, since it uses less digits than its factorization.

2159655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143985.

The product of its digits is 13500, while the sum is 33.

The square root of 2159655 is about 1469.5764695993. The cubic root of 2159655 is about 129.2591988135.

It can be divided in two parts, 215 and 9655, that added together give a triangular number (9870 = T₁₄₀).

The spelling of 2159655 in words is "two million, one hundred fifty-nine thousand, six hundred fifty-five".