2155154430 has 256 divisors, whose sum is σ = 6662476800. Its totient is φ = 437821440.

The previous prime is 2155154411. The next prime is 2155154437. The reversal of 2155154430 is 344515512.

2155154430 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2155154437) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 2114461 + ... + 2115479.

It is an arithmetic number, because the mean of its divisors is an integer number (26025300).

Almost surely, 2^2155154430 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2155154430, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3331238400).

2155154430 is an abundant number, since it is smaller than the sum of its proper divisors (4507322370).

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

2155154430 is a wasteful number, since it uses less digits than its factorization.

2155154430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1099.

The product of its (nonzero) digits is 12000, while the sum is 30.

The square root of 2155154430 is about 46423.6408524795. The cubic root of 2155154430 is about 1291.6934732603.

Adding to 2155154430 its reverse (344515512), we get a palindrome (2499669942).

The spelling of 2155154430 in words is "two billion, one hundred fifty-five million, one hundred fifty-four thousand, four hundred thirty".