31443574006849 has 3 divisors (see below), whose sum is σ = 31443579614307. Its totient is φ = 31443568399392.

The previous prime is 31443574006841. The next prime is 31443574006853. The reversal of 31443574006849 is 94860047534413.

It is a happy number.

The square root of 31443574006849 is 5607457.

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

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 23025266356225 + 8418307650624 = 4798465^2 + 2901432^2 .

It is not a de Polignac number, because 31443574006849 - 2³ = 31443574006841 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31443574006793 and 31443574006802.

It is not an unprimeable number, because it can be changed into a prime (31443574006841) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 2803729 + ... + 8411185.

It is an arithmetic number, because the mean of its divisors is an integer number (10481193204769).

Almost surely, 2^{31443574006849} is an apocalyptic number.

31443574006849 is the 5607457-th square number.

31443574006849 is the 2803729-th centered octagonal number.

It is an amenable number.

31443574006849 is a deficient number, since it is larger than the sum of its proper divisors (5607458).

31443574006849 is an frugal number, since it uses more digits than its factorization.

31443574006849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11214914 (or 5607457 counting only the distinct ones).

The product of its (nonzero) digits is 34836480, while the sum is 58.

The spelling of 31443574006849 in words is "thirty-one trillion, four hundred forty-three billion, five hundred seventy-four million, six thousand, eight hundred forty-nine".