54140643 has 28 divisors (see below), whose sum is σ = 84729360. Its totient is φ = 34513776.

The previous prime is 54140617. The next prime is 54140687. The reversal of 54140643 is 34604145.

54140643 is a `hidden beast` number, since 5 + 4 + 14 + 0 + 643 = 666.

It is not a de Polignac number, because 54140643 - 2¹⁰ = 54139619 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (54140693) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 15153 + ... + 18381.

Almost surely, 2^54140643 is an apocalyptic number.

54140643 is a deficient number, since it is larger than the sum of its proper divisors (30588717).

54140643 is an equidigital number, since it uses as much as digits as its factorization.

54140643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3270 (or 3255 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

The square root of 54140643 is about 7358.0325495339. The cubic root of 54140643 is about 378.3041769316.

Adding to 54140643 its reverse (34604145), we get a palindrome (88744788).

The spelling of 54140643 in words is "fifty-four million, one hundred forty thousand, six hundred forty-three".