61143111 has 12 divisors (see below), whose sum is σ = 88782720. Its totient is φ = 40547520.

The previous prime is 61143073. The next prime is 61143133. The reversal of 61143111 is 11134116.

61143111 is a `hidden beast` number, since 611 + 43 + 1 + 11 = 666.

It is not a de Polignac number, because 61143111 - 2¹⁴ = 61126727 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61143151) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16066 + ... + 19503.

It is an arithmetic number, because the mean of its divisors is an integer number (7398560).

Almost surely, 2^61143111 is an apocalyptic number.

61143111 is a deficient number, since it is larger than the sum of its proper divisors (27639609).

61143111 is a wasteful number, since it uses less digits than its factorization.

61143111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35766 (or 35763 counting only the distinct ones).

The product of its digits is 72, while the sum is 18.

The square root of 61143111 is about 7819.4060516129. The cubic root of 61143111 is about 393.9573227156.

Adding to 61143111 its reverse (11134116), we get a palindrome (72277227).

The spelling of 61143111 in words is "sixty-one million, one hundred forty-three thousand, one hundred eleven".