31342403 has 4 divisors (see below), whose sum is σ = 31365048. Its totient is φ = 31319760.

The previous prime is 31342379. The next prime is 31342429. The reversal of 31342403 is 30424313.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31342403 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31342463) 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, 9101 + ... + 12062.

It is an arithmetic number, because the mean of its divisors is an integer number (7841262).

Almost surely, 2^31342403 is an apocalyptic number.

31342403 is a deficient number, since it is larger than the sum of its proper divisors (22645).

31342403 is a wasteful number, since it uses less digits than its factorization.

31342403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22644.

The product of its (nonzero) digits is 864, while the sum is 20.

The square root of 31342403 is about 5598.4286188180. The cubic root of 31342403 is about 315.2904116074.

Adding to 31342403 its reverse (30424313), we get a palindrome (61766716).

The spelling of 31342403 in words is "thirty-one million, three hundred forty-two thousand, four hundred three".