30681543 has 8 divisors (see below), whose sum is σ = 40982656. Its totient is φ = 20417400.

The previous prime is 30681533. The next prime is 30681551. The reversal of 30681543 is 34518603.

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

It is not a de Polignac number, because 30681543 - 2¹³ = 30673351 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 30681543.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30681533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7243 + ... + 10668.

It is an arithmetic number, because the mean of its divisors is an integer number (5122832).

Almost surely, 2^30681543 is an apocalyptic number.

30681543 is a deficient number, since it is larger than the sum of its proper divisors (10301113).

30681543 is a wasteful number, since it uses less digits than its factorization.

30681543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18485.

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 30681543 is about 5539.0922541514. The cubic root of 30681543 is about 313.0586674284.

The spelling of 30681543 in words is "thirty million, six hundred eighty-one thousand, five hundred forty-three".