61102543 has 4 divisors (see below), whose sum is σ = 61329960. Its totient is φ = 60875128.

The previous prime is 61102511. The next prime is 61102549. The reversal of 61102543 is 34520116.

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

It is a cyclic number.

It is not a de Polignac number, because 61102543 - 2⁵ = 61102511 is a prime.

It is a super-2 number, since 2×61102543² = 7467041522133698, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61102549) 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, 113305 + ... + 113842.

It is an arithmetic number, because the mean of its divisors is an integer number (15332490).

Almost surely, 2^61102543 is an apocalyptic number.

61102543 is a deficient number, since it is larger than the sum of its proper divisors (227417).

61102543 is a wasteful number, since it uses less digits than its factorization.

61102543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 227416.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 61102543 is about 7816.8115622676. The cubic root of 61102543 is about 393.8701741861.

Adding to 61102543 its reverse (34520116), we get a palindrome (95622659).

The spelling of 61102543 in words is "sixty-one million, one hundred two thousand, five hundred forty-three".