31003244420 has 24 divisors (see below), whose sum is σ = 68936626584. Its totient is φ = 11671809536.

The previous prime is 31003244417. The next prime is 31003244443. The reversal of 31003244420 is 2444230013.

It can be written as a sum of positive squares in 4 ways, for example, as 17222362756 + 13780881664 = 131234^2 + 117392^2 .

It is a super-2 number, since 2×31003244420² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45592667 + ... + 45593346.

It is an arithmetic number, because the mean of its divisors is an integer number (2872359441).

Almost surely, 2^31003244420 is an apocalyptic number.

It is an amenable number.

31003244420 is an abundant number, since it is smaller than the sum of its proper divisors (37933382164).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31003244420 is a wasteful number, since it uses less digits than its factorization.

31003244420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91186039 (or 91186037 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 23.

Adding to 31003244420 its reverse (2444230013), we get a palindrome (33447474433).

The spelling of 31003244420 in words is "thirty-one billion, three million, two hundred forty-four thousand, four hundred twenty".