31054561 has 2 divisors, whose sum is σ = 31054562. Its totient is φ = 31054560.

The previous prime is 31054559. The next prime is 31054579. The reversal of 31054561 is 16545013.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23040000 + 8014561 = 4800^2 + 2831^2 .

It is an emirp because it is prime and its reverse (16545013) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31054561 - 2¹ = 31054559 is a prime.

Together with 31054559, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (31054501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15527280 + 15527281.

It is an arithmetic number, because the mean of its divisors is an integer number (15527281).

Almost surely, 2^31054561 is an apocalyptic number.

It is an amenable number.

31054561 is a deficient number, since it is larger than the sum of its proper divisors (1).

31054561 is an equidigital number, since it uses as much as digits as its factorization.

31054561 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1800, while the sum is 25.

The square root of 31054561 is about 5572.6619312497. The cubic root of 31054561 is about 314.3222549309.

Adding to 31054561 its reverse (16545013), we get a palindrome (47599574).

The spelling of 31054561 in words is "thirty-one million, fifty-four thousand, five hundred sixty-one".