61304143 has 16 divisors (see below), whose sum is σ = 65479680. Its totient is φ = 57297600.

The previous prime is 61304141. The next prime is 61304149. The reversal of 61304143 is 34140316.

It is a cyclic number.

It is not a de Polignac number, because 61304143 - 2¹ = 61304141 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 (61304141) 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 15 ways as a sum of consecutive naturals, for example, 176496 + ... + 176842.

It is an arithmetic number, because the mean of its divisors is an integer number (4092480).

Almost surely, 2^61304143 is an apocalyptic number.

61304143 is a deficient number, since it is larger than the sum of its proper divisors (4175537).

61304143 is a wasteful number, since it uses less digits than its factorization.

61304143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 558.

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 61304143 is about 7829.6962265467. The cubic root of 61304143 is about 394.3028733556.

Adding to 61304143 its reverse (34140316), we get a palindrome (95444459).

The spelling of 61304143 in words is "sixty-one million, three hundred four thousand, one hundred forty-three".