2154543982 has 8 divisors (see below), whose sum is σ = 3306974616. Its totient is φ = 1052219112.

The previous prime is 2154543971. The next prime is 2154543983. The reversal of 2154543982 is 2893454512.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2154543983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12526333 + ... + 12526504.

It is an arithmetic number, because the mean of its divisors is an integer number (413371827).

Almost surely, 2^2154543982 is an apocalyptic number.

2154543982 is a deficient number, since it is larger than the sum of its proper divisors (1152430634).

2154543982 is a wasteful number, since it uses less digits than its factorization.

2154543982 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25052882.

The product of its digits is 345600, while the sum is 43.

The square root of 2154543982 is about 46417.0656332345. The cubic root of 2154543982 is about 1291.5715042501.

The spelling of 2154543982 in words is "two billion, one hundred fifty-four million, five hundred forty-three thousand, nine hundred eighty-two".