31142244403 has 4 divisors (see below), whose sum is σ = 31142597368. Its totient is φ = 31141891440.

The previous prime is 31142244377. The next prime is 31142244407. The reversal of 31142244403 is 30444224113.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 30444224113 = 107 ⋅284525459.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31142244403 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31142244407) 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, 85375 + ... + 263767.

It is an arithmetic number, because the mean of its divisors is an integer number (7785649342).

Almost surely, 2^31142244403 is an apocalyptic number.

31142244403 is a deficient number, since it is larger than the sum of its proper divisors (352965).

31142244403 is a wasteful number, since it uses less digits than its factorization.

31142244403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 352964.

The product of its (nonzero) digits is 9216, while the sum is 28.

Adding to 31142244403 its reverse (30444224113), we get a palindrome (61586468516).

The spelling of 31142244403 in words is "thirty-one billion, one hundred forty-two million, two hundred forty-four thousand, four hundred three".