2154638043 has 16 divisors (see below), whose sum is σ = 3295027200. Its totient is φ = 1390088520.

The previous prime is 2154638039. The next prime is 2154638047. The reversal of 2154638043 is 3408364512.

2154638043 is a `hidden beast` number, since 2 + 15 + 4 + 638 + 0 + 4 + 3 = 666.

It is an interprime number because it is at equal distance from previous prime (2154638039) and next prime (2154638047).

It is not a de Polignac number, because 2154638043 - 2² = 2154638039 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2154637989 and 2154638007.

It is not an unprimeable number, because it can be changed into a prime (2154638047) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1286283 + ... + 1287956.

It is an arithmetic number, because the mean of its divisors is an integer number (205939200).

Almost surely, 2^2154638043 is an apocalyptic number.

2154638043 is a deficient number, since it is larger than the sum of its proper divisors (1140389157).

2154638043 is a wasteful number, since it uses less digits than its factorization.

2154638043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2574279 (or 2574273 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 36.

The square root of 2154638043 is about 46418.0788378838. The cubic root of 2154638043 is about 1291.5902993703.

The spelling of 2154638043 in words is "two billion, one hundred fifty-four million, six hundred thirty-eight thousand, forty-three".