2155335042 has 64 divisors (see below), whose sum is σ = 5130547200. Its totient is φ = 590587200.

The previous prime is 2155335041. The next prime is 2155335073. The reversal of 2155335042 is 2405335512.

It is not an unprimeable number, because it can be changed into a prime (2155335041) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 178059 + ... + 189777.

It is an arithmetic number, because the mean of its divisors is an integer number (80164800).

Almost surely, 2^2155335042 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2155335042, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2565273600).

2155335042 is an abundant number, since it is smaller than the sum of its proper divisors (2975212158).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2155335042 is a wasteful number, since it uses less digits than its factorization.

2155335042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11911.

The product of its (nonzero) digits is 18000, while the sum is 30.

The square root of 2155335042 is about 46425.5860706141. The cubic root of 2155335042 is about 1291.7295555663.

The spelling of 2155335042 in words is "two billion, one hundred fifty-five million, three hundred thirty-five thousand, forty-two".