31323203223 has 32 divisors (see below), whose sum is σ = 46951435776. Its totient is φ = 18430270848.

The previous prime is 31323203221. The next prime is 31323203227. The reversal of 31323203223 is 32230232313.

It is not a de Polignac number, because 31323203223 - 2¹ = 31323203221 is a prime.

It is a super-2 number, since 2×31323203223² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31323203193 and 31323203202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31323203221) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2853261 + ... + 2864217.

It is an arithmetic number, because the mean of its divisors is an integer number (1467232368).

Almost surely, 2^31323203223 is an apocalyptic number.

31323203223 is a deficient number, since it is larger than the sum of its proper divisors (15628232553).

31323203223 is a wasteful number, since it uses less digits than its factorization.

31323203223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14183.

The product of its (nonzero) digits is 3888, while the sum is 24.

Adding to 31323203223 its reverse (32230232313), we get a palindrome (63553435536).

The spelling of 31323203223 in words is "thirty-one billion, three hundred twenty-three million, two hundred three thousand, two hundred twenty-three".