2158540452 has 36 divisors (see below), whose sum is σ = 5495577360. Its totient is φ = 714335472.

The previous prime is 2158540427. The next prime is 2158540519. The reversal of 2158540452 is 2540458512.

2158540452 is a `hidden beast` number, since 2 + 158 + 54 + 0 + 452 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

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

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 210678 + ... + 220685.

Almost surely, 2^2158540452 is an apocalyptic number.

It is an amenable number.

2158540452 is an abundant number, since it is smaller than the sum of its proper divisors (3337036908).

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

2158540452 is a wasteful number, since it uses less digits than its factorization.

2158540452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 431512 (or 431507 counting only the distinct ones).

The product of its (nonzero) digits is 64000, while the sum is 36.

The square root of 2158540452 is about 46460.0952646462. The cubic root of 2158540452 is about 1292.3695909291.

Adding to 2158540452 its reverse (2540458512), we get a palindrome (4698998964).

The spelling of 2158540452 in words is "two billion, one hundred fifty-eight million, five hundred forty thousand, four hundred fifty-two".