31420044049 has 3 divisors (see below), whose sum is σ = 31420221307. Its totient is φ = 31419866792.

The previous prime is 31420044041. The next prime is 31420044091. The reversal of 31420044049 is 94044002413.

The square root of 31420044049 is 177257.

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., 31408700625 + 11343424 = 177225^2 + 3368^2 .

It is not a de Polignac number, because 31420044049 - 2³ = 31420044041 is a prime.

It is a super-2 number, since 2×31420044049² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 31420044049.

It is not an unprimeable number, because it can be changed into a prime (31420044041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 88629 + ... + 265885.

Almost surely, 2^31420044049 is an apocalyptic number.

31420044049 is the 177257-th square number.

31420044049 is the 88629-th centered octagonal number.

It is an amenable number.

31420044049 is a deficient number, since it is larger than the sum of its proper divisors (177258).

31420044049 is an frugal number, since it uses more digits than its factorization.

31420044049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 354514 (or 177257 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 31.

The spelling of 31420044049 in words is "thirty-one billion, four hundred twenty million, forty-four thousand, forty-nine".