2155204 has 6 divisors (see below), whose sum is σ = 3771614. Its totient is φ = 1077600.

The previous prime is 2155201. The next prime is 2155207. The reversal of 2155204 is 4025512.

2155204 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (2155201) and next prime (2155207).

It can be written as a sum of positive squares in only one way, i.e., 1327104 + 828100 = 1152^2 + 910^2 .

It is not an unprimeable number, because it can be changed into a prime (2155201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 269397 + ... + 269404.

2^2155204 is an apocalyptic number.

It is an amenable number.

2155204 is a deficient number, since it is larger than the sum of its proper divisors (1616410).

2155204 is a wasteful number, since it uses less digits than its factorization.

2155204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 538805 (or 538803 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 19.

The square root of 2155204 is about 1468.0613066218. The cubic root of 2155204 is about 129.1703376457.

It can be divided in two parts, 21 and 55204, that added together give a square (55225 = 235²).

The spelling of 2155204 in words is "two million, one hundred fifty-five thousand, two hundred four".