2155154724 has 72 divisors (see below), whose sum is σ = 5759936000. Its totient is φ = 677553984.

The previous prime is 2155154723. The next prime is 2155154777. The reversal of 2155154724 is 4274515512.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (2155154723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 149757 + ... + 163515.

Almost surely, 2^2155154724 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2155154724, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2879968000).

2155154724 is an abundant number, since it is smaller than the sum of its proper divisors (3604781276).

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

2155154724 is a wasteful number, since it uses less digits than its factorization.

2155154724 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14017 (or 14012 counting only the distinct ones).

The product of its digits is 56000, while the sum is 36.

The square root of 2155154724 is about 46423.6440189695. The cubic root of 2155154724 is about 1291.6935319967.

The spelling of 2155154724 in words is "two billion, one hundred fifty-five million, one hundred fifty-four thousand, seven hundred twenty-four".