31421242303 has 4 divisors (see below), whose sum is σ = 34277718888. Its totient is φ = 28564765720.

The previous prime is 31421242271. The next prime is 31421242327. The reversal of 31421242303 is 30324212413.

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 31421242303 - 2⁵ = 31421242271 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 (31421242703) 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, 1428238276 + ... + 1428238297.

It is an arithmetic number, because the mean of its divisors is an integer number (8569429722).

Almost surely, 2^31421242303 is an apocalyptic number.

31421242303 is a deficient number, since it is larger than the sum of its proper divisors (2856476585).

31421242303 is a wasteful number, since it uses less digits than its factorization.

31421242303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2856476584.

The product of its (nonzero) digits is 3456, while the sum is 25.

Adding to 31421242303 its reverse (30324212413), we get a palindrome (61745454716).

The spelling of 31421242303 in words is "thirty-one billion, four hundred twenty-one million, two hundred forty-two thousand, three hundred three".