61143103 has 4 divisors (see below), whose sum is σ = 69877840. Its totient is φ = 52408368.

The previous prime is 61143073. The next prime is 61143133. The reversal of 61143103 is 30134116.

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

It is an interprime number because it is at equal distance from previous prime (61143073) and next prime (61143133).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61143103 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 (61143133) 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, 4367358 + ... + 4367371.

It is an arithmetic number, because the mean of its divisors is an integer number (17469460).

Almost surely, 2^61143103 is an apocalyptic number.

61143103 is a deficient number, since it is larger than the sum of its proper divisors (8734737).

61143103 is an equidigital number, since it uses as much as digits as its factorization.

61143103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8734736.

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 61143103 is about 7819.4055400651. The cubic root of 61143103 is about 393.9573055337.

Adding to 61143103 its reverse (30134116), we get a palindrome (91277219).

The spelling of 61143103 in words is "sixty-one million, one hundred forty-three thousand, one hundred three".