31020228623 has 4 divisors (see below), whose sum is σ = 31031499168. Its totient is φ = 31008958080.

The previous prime is 31020228619. The next prime is 31020228637. The reversal of 31020228623 is 32682202013.

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 31020228623 - 2² = 31020228619 is a prime.

It is a super-2 number, since 2×31020228623² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31020228023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5631143 + ... + 5636648.

It is an arithmetic number, because the mean of its divisors is an integer number (7757874792).

Almost surely, 2^31020228623 is an apocalyptic number.

31020228623 is a deficient number, since it is larger than the sum of its proper divisors (11270545).

31020228623 is a wasteful number, since it uses less digits than its factorization.

31020228623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11270544.

The product of its (nonzero) digits is 6912, while the sum is 29.

The spelling of 31020228623 in words is "thirty-one billion, twenty million, two hundred twenty-eight thousand, six hundred twenty-three".