2155555442 has 32 divisors (see below), whose sum is σ = 3433320000. Its totient is φ = 1013414976.

The previous prime is 2155555429. The next prime is 2155555481. The reversal of 2155555442 is 2445555512.

It is a junction number, because it is equal to n+sod(n) for n = 2155555396 and 2155555405.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 370109 + ... + 375887.

It is an arithmetic number, because the mean of its divisors is an integer number (107291250).

Almost surely, 2^2155555442 is an apocalyptic number.

2155555442 is a deficient number, since it is larger than the sum of its proper divisors (1277764558).

2155555442 is a wasteful number, since it uses less digits than its factorization.

2155555442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5978.

The product of its digits is 200000, while the sum is 38.

The square root of 2155555442 is about 46427.9597010250. The cubic root of 2155555442 is about 1291.7735839091.

The spelling of 2155555442 in words is "two billion, one hundred fifty-five million, five hundred fifty-five thousand, four hundred forty-two".