61315543 has 8 divisors (see below), whose sum is σ = 62106912. Its totient is φ = 60527616.

The previous prime is 61315537. The next prime is 61315559. The reversal of 61315543 is 34551316.

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 61315543 - 2⁵ = 61315511 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 (61315523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 62271 + ... + 63247.

It is an arithmetic number, because the mean of its divisors is an integer number (7763364).

Almost surely, 2^61315543 is an apocalyptic number.

61315543 is a deficient number, since it is larger than the sum of its proper divisors (791369).

61315543 is an equidigital number, since it uses as much as digits as its factorization.

61315543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1721.

The product of its digits is 5400, while the sum is 28.

The square root of 61315543 is about 7830.4241902977. The cubic root of 61315543 is about 394.3273131076.

Adding to 61315543 its reverse (34551316), we get a palindrome (95866859).

The spelling of 61315543 in words is "sixty-one million, three hundred fifteen thousand, five hundred forty-three".