31302020223 has 12 divisors (see below), whose sum is σ = 47179856880. Its totient is φ = 19960708416.

The previous prime is 31302020201. The next prime is 31302020251. The reversal of 31302020223 is 32202020313.

It is a happy number.

It is not a de Polignac number, because 31302020223 - 2⁸ = 31302019967 is a prime.

It is a super-2 number, since 2×31302020223² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31302020196 and 31302020205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31302020273) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 75608538 + ... + 75608951.

It is an arithmetic number, because the mean of its divisors is an integer number (3931654740).

Almost surely, 2^31302020223 is an apocalyptic number.

31302020223 is a deficient number, since it is larger than the sum of its proper divisors (15877836657).

31302020223 is a wasteful number, since it uses less digits than its factorization.

31302020223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151217518 (or 151217515 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 18.

Adding to 31302020223 its reverse (32202020313), we get a palindrome (63504040536).

The spelling of 31302020223 in words is "thirty-one billion, three hundred two million, twenty thousand, two hundred twenty-three".