2155554122 has 4 divisors (see below), whose sum is σ = 3233331186. Its totient is φ = 1077777060.

The previous prime is 2155554113. The next prime is 2155554139. The reversal of 2155554122 is 2214555512.

It is a happy number.

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., 1835179921 + 320374201 = 42839^2 + 17899^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 538888529 + ... + 538888532.

Almost surely, 2^2155554122 is an apocalyptic number.

2155554122 is a deficient number, since it is larger than the sum of its proper divisors (1077777064).

2155554122 is a wasteful number, since it uses less digits than its factorization.

2155554122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1077777063.

The product of its digits is 20000, while the sum is 32.

The square root of 2155554122 is about 46427.9454854509. The cubic root of 2155554122 is about 1291.7733202274.

The spelling of 2155554122 in words is "two billion, one hundred fifty-five million, five hundred fifty-four thousand, one hundred twenty-two".