61415543 has 32 divisors (see below), whose sum is σ = 81699840. Its totient is φ = 44858880.

The previous prime is 61415527. The next prime is 61415573. The reversal of 61415543 is 34551416.

It is a happy number.

61415543 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 61415543 - 2⁴ = 61415527 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 (61415573) 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 31 ways as a sum of consecutive naturals, for example, 51413 + ... + 52593.

It is an arithmetic number, because the mean of its divisors is an integer number (2553120).

Almost surely, 2^61415543 is an apocalyptic number.

61415543 is a deficient number, since it is larger than the sum of its proper divisors (20284297).

61415543 is a wasteful number, since it uses less digits than its factorization.

61415543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1247.

The product of its digits is 7200, while the sum is 29.

The square root of 61415543 is about 7836.8069390537. The cubic root of 61415543 is about 394.5415671761.

Adding to 61415543 its reverse (34551416), we get a palindrome (95966959).

The spelling of 61415543 in words is "sixty-one million, four hundred fifteen thousand, five hundred forty-three".