2155450434 has 48 divisors (see below), whose sum is σ = 4647999648. Its totient is φ = 666091008.

The previous prime is 2155450397. The next prime is 2155450439. The reversal of 2155450434 is 4340545512.

It is a junction number, because it is equal to n+sod(n) for n = 2155450395 and 2155450404.

It is not an unprimeable number, because it can be changed into a prime (2155450439) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 106902 + ... + 125454.

It is an arithmetic number, because the mean of its divisors is an integer number (96833326).

Almost surely, 2^2155450434 is an apocalyptic number.

2155450434 is an abundant number, since it is smaller than the sum of its proper divisors (2492549214).

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

2155450434 is a wasteful number, since it uses less digits than its factorization.

2155450434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18659 (or 18642 counting only the distinct ones).

The product of its (nonzero) digits is 48000, while the sum is 33.

The square root of 2155450434 is about 46426.8288169675. The cubic root of 2155450434 is about 1291.7526072951.

Adding to 2155450434 its reverse (4340545512), we get a palindrome (6495995946).

The spelling of 2155450434 in words is "two billion, one hundred fifty-five million, four hundred fifty thousand, four hundred thirty-four".