61043543 has 4 divisors (see below), whose sum is σ = 66592968. Its totient is φ = 55494120.

The previous prime is 61043539. The next prime is 61043581. The reversal of 61043543 is 34534016.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 61043543 - 2² = 61043539 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 (61043513) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2774696 + ... + 2774717.

It is an arithmetic number, because the mean of its divisors is an integer number (16648242).

Almost surely, 2^61043543 is an apocalyptic number.

61043543 is a deficient number, since it is larger than the sum of its proper divisors (5549425).

61043543 is a wasteful number, since it uses less digits than its factorization.

61043543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5549424.

The product of its (nonzero) digits is 4320, while the sum is 26.

The square root of 61043543 is about 7813.0367335627. The cubic root of 61043543 is about 393.7433610034.

Adding to 61043543 its reverse (34534016), we get a palindrome (95577559).

The spelling of 61043543 in words is "sixty-one million, forty-three thousand, five hundred forty-three".