31144430404 has 12 divisors (see below), whose sum is σ = 56382158700. Its totient is φ = 15035242208.

The previous prime is 31144430377. The next prime is 31144430407. The reversal of 31144430404 is 40403444113.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 7097725504 + 24046704900 = 84248^2 + 155070^2 .

It is not an unprimeable number, because it can be changed into a prime (31144430407) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 134243119 + ... + 134243350.

It is an arithmetic number, because the mean of its divisors is an integer number (4698513225).

Almost surely, 2^31144430404 is an apocalyptic number.

It is an amenable number.

31144430404 is a deficient number, since it is larger than the sum of its proper divisors (25237728296).

31144430404 is a wasteful number, since it uses less digits than its factorization.

31144430404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 268486502 (or 268486500 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 28.

Adding to 31144430404 its reverse (40403444113), we get a palindrome (71547874517).

The spelling of 31144430404 in words is "thirty-one billion, one hundred forty-four million, four hundred thirty thousand, four hundred four".