2155434442 has 24 divisors (see below), whose sum is σ = 3958964640. Its totient is φ = 875138040.

The previous prime is 2155434389. The next prime is 2155434467. The reversal of 2155434442 is 2444345512.

It is a junction number, because it is equal to n+sod(n) for n = 2155434398 and 2155434407.

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 in 11 ways as a sum of consecutive naturals, for example, 576934 + ... + 580657.

It is an arithmetic number, because the mean of its divisors is an integer number (164956860).

Almost surely, 2^2155434442 is an apocalyptic number.

2155434442 is a deficient number, since it is larger than the sum of its proper divisors (1803530198).

2155434442 is a wasteful number, since it uses less digits than its factorization.

2155434442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1157626 (or 1157619 counting only the distinct ones).

The product of its digits is 76800, while the sum is 34.

The square root of 2155434442 is about 46426.6565886453. The cubic root of 2155434442 is about 1291.7494126406.

Adding to 2155434442 its reverse (2444345512), we get a palindrome (4599779954).

The spelling of 2155434442 in words is "two billion, one hundred fifty-five million, four hundred thirty-four thousand, four hundred forty-two".