31023220203 has 24 divisors (see below), whose sum is σ = 46769049600. Its totient is φ = 19778940720.

The previous prime is 31023220201. The next prime is 31023220213. The reversal of 31023220203 is 30202232013.

It is a happy number.

It is not a de Polignac number, because 31023220203 - 2¹ = 31023220201 is a prime.

It is a super-2 number, since 2×31023220203² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (31023220201) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1286148 + ... + 1310046.

It is an arithmetic number, because the mean of its divisors is an integer number (1948710400).

Almost surely, 2^31023220203 is an apocalyptic number.

31023220203 is a deficient number, since it is larger than the sum of its proper divisors (15745829397).

31023220203 is a wasteful number, since it uses less digits than its factorization.

31023220203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30199 (or 30196 counting only the distinct ones).

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

Adding to 31023220203 its reverse (30202232013), we get a palindrome (61225452216).

The spelling of 31023220203 in words is "thirty-one billion, twenty-three million, two hundred twenty thousand, two hundred three".