2155111452 has 72 divisors (see below), whose sum is σ = 6069030240. Its totient is φ = 640241280.

The previous prime is 2155111447. The next prime is 2155111457. The reversal of 2155111452 is 2541115512.

It is a happy number.

2155111452 is a `hidden beast` number, since 2 + 1 + 5 + 511 + 145 + 2 = 666.

It is an interprime number because it is at equal distance from previous prime (2155111447) and next prime (2155111457).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2155111457) 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, 65824 + ... + 92967.

Almost surely, 2^2155111452 is an apocalyptic number.

It is an amenable number.

2155111452 is an abundant number, since it is smaller than the sum of its proper divisors (3913918788).

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

2155111452 is a wasteful number, since it uses less digits than its factorization.

2155111452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158843 (or 158838 counting only the distinct ones).

The product of its digits is 2000, while the sum is 27.

The square root of 2155111452 is about 46423.1779610143. The cubic root of 2155111452 is about 1291.6848869040.

Adding to 2155111452 its reverse (2541115512), we get a palindrome (4696226964).

The spelling of 2155111452 in words is "two billion, one hundred fifty-five million, one hundred eleven thousand, four hundred fifty-two".