2156355 has 16 divisors (see below), whose sum is σ = 3833760. Its totient is φ = 1149984.

The previous prime is 2156351. The next prime is 2156359. The reversal of 2156355 is 5536512.

2156355 is a `hidden beast` number, since 21 + 5 + 635 + 5 = 666.

It is an interprime number because it is at equal distance from previous prime (2156351) and next prime (2156359).

It is not a de Polignac number, because 2156355 - 2² = 2156351 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a zygodrome in base 3.

It is not an unprimeable number, because it can be changed into a prime (2156351) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7852 + ... + 8121.

It is an arithmetic number, because the mean of its divisors is an integer number (239610).

2^2156355 is an apocalyptic number.

2156355 is a deficient number, since it is larger than the sum of its proper divisors (1677405).

2156355 is a wasteful number, since it uses less digits than its factorization.

2156355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15987 (or 15981 counting only the distinct ones).

The product of its digits is 4500, while the sum is 27.

The square root of 2156355 is about 1468.4532678979. The cubic root of 2156355 is about 129.1933282921.

The spelling of 2156355 in words is "two million, one hundred fifty-six thousand, three hundred fifty-five".