2165554 has 4 divisors (see below), whose sum is σ = 3248334. Its totient is φ = 1082776.

The previous prime is 2165551. The next prime is 2165557. The reversal of 2165554 is 4555612.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (2165551) and next prime (2165557).

It can be written as a sum of positive squares in only one way, i.e., 2024929 + 140625 = 1423^2 + 375^2 .

It is not an unprimeable number, because it can be changed into a prime (2165551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 541387 + ... + 541390.

2^2165554 is an apocalyptic number.

2165554 is a deficient number, since it is larger than the sum of its proper divisors (1082780).

2165554 is a wasteful number, since it uses less digits than its factorization.

2165554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1082779.

The product of its digits is 6000, while the sum is 28.

The square root of 2165554 is about 1471.5821417780. The cubic root of 2165554 is about 129.3767803749.

The spelling of 2165554 in words is "two million, one hundred sixty-five thousand, five hundred fifty-four".