31230030031 has 4 divisors (see below), whose sum is σ = 31378039864. Its totient is φ = 31082020200.

The previous prime is 31230030001. The next prime is 31230030053. The reversal of 31230030031 is 13003003213.

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 31230030031 - 2⁷ = 31230029903 is a prime.

It is a super-2 number, since 2×31230030031² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31230029987 and 31230030014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31230030001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 74004600 + ... + 74005021.

It is an arithmetic number, because the mean of its divisors is an integer number (7844509966).

Almost surely, 2^31230030031 is an apocalyptic number.

31230030031 is a deficient number, since it is larger than the sum of its proper divisors (148009833).

31230030031 is a wasteful number, since it uses less digits than its factorization.

31230030031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148009832.

The product of its (nonzero) digits is 162, while the sum is 16.

Adding to 31230030031 its reverse (13003003213), we get a palindrome (44233033244).

The spelling of 31230030031 in words is "thirty-one billion, two hundred thirty million, thirty thousand, thirty-one".