42731103 has 4 divisors (see below), whose sum is σ = 56974808. Its totient is φ = 28487400.

The previous prime is 42731083. The next prime is 42731141. The reversal of 42731103 is 30113724.

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

It is not a de Polignac number, because 42731103 - 2¹² = 42727007 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 42731103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42731203) 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, 7121848 + ... + 7121853.

It is an arithmetic number, because the mean of its divisors is an integer number (14243702).

Almost surely, 2^42731103 is an apocalyptic number.

42731103 is a deficient number, since it is larger than the sum of its proper divisors (14243705).

42731103 is a wasteful number, since it uses less digits than its factorization.

42731103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14243704.

The product of its (nonzero) digits is 504, while the sum is 21.

The square root of 42731103 is about 6536.9031658730. The cubic root of 42731103 is about 349.6080046718.

Adding to 42731103 its reverse (30113724), we get a palindrome (72844827).

The spelling of 42731103 in words is "forty-two million, seven hundred thirty-one thousand, one hundred three".