31813003044 has 99 divisors (see below), whose sum is σ = 83736825627. Its totient is φ = 10575439704.

The previous prime is 31813003009. The next prime is 31813003051. The reversal of 31813003044 is 44030031813.

The square root of 31813003044 is 178362.

It is a perfect power (a square), and thus also a powerful number.

31813003044 is a `hidden beast` number, since 318 + 1 + 300 + 3 + 0 + 44 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 31813002999 and 31813003017.

It is an unprimeable number.

It is a polite number, since it can be written in 32 ways as a sum of consecutive naturals, for example, 86683749 + ... + 86684115.

Almost surely, 2^31813003044 is an apocalyptic number.

31813003044 is the 178362-nd square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31813003044

31813003044 is an abundant number, since it is smaller than the sum of its proper divisors (51923822583).

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

31813003044 is an frugal number, since it uses more digits than its factorization.

31813003044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 768 (or 372 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

Adding to 31813003044 its reverse (44030031813), we get a palindrome (75843034857).

The spelling of 31813003044 in words is "thirty-one billion, eight hundred thirteen million, three thousand, forty-four".