61115543 has 8 divisors (see below), whose sum is σ = 62820576. Its totient is φ = 59420800.

The previous prime is 61115521. The next prime is 61115567. The reversal of 61115543 is 34551116.

61115543 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 61115543 - 2¹⁶ = 61050007 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61115503) 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, 10355 + ... + 15147.

It is an arithmetic number, because the mean of its divisors is an integer number (7852572).

Almost surely, 2^61115543 is an apocalyptic number.

61115543 is a deficient number, since it is larger than the sum of its proper divisors (1705033).

61115543 is a wasteful number, since it uses less digits than its factorization.

61115543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5145.

The product of its digits is 1800, while the sum is 26.

The square root of 61115543 is about 7817.6430591323. The cubic root of 61115543 is about 393.8981050977.

Adding to 61115543 its reverse (34551116), we get a palindrome (95666659).

The spelling of 61115543 in words is "sixty-one million, one hundred fifteen thousand, five hundred forty-three".