2103665554 has 4 divisors (see below), whose sum is σ = 3155498334. Its totient is φ = 1051832776.

The previous prime is 2103665521. The next prime is 2103665567. The reversal of 2103665554 is 4555663012.

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

It can be written as a sum of positive squares in only one way, i.e., 2054174329 + 49491225 = 45323^2 + 7035^2 .

It is a super-2 number, since 2×2103665554² = 8850817526172253832, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 525916387 + ... + 525916390.

Almost surely, 2^2103665554 is an apocalyptic number.

2103665554 is a deficient number, since it is larger than the sum of its proper divisors (1051832780).

2103665554 is a wasteful number, since it uses less digits than its factorization.

2103665554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1051832779.

The product of its (nonzero) digits is 108000, while the sum is 37.

The square root of 2103665554 is about 45865.7339851877. The cubic root of 2103665554 is about 1281.3238163492.

The spelling of 2103665554 in words is "two billion, one hundred three million, six hundred sixty-five thousand, five hundred fifty-four".