31230541 has 2 divisors, whose sum is σ = 31230542. Its totient is φ = 31230540.

The previous prime is 31230533. The next prime is 31230559. The reversal of 31230541 is 14503213.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22762441 + 8468100 = 4771^2 + 2910^2 .

It is a cyclic number.

It is not a de Polignac number, because 31230541 - 2³ = 31230533 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31239541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15615270 + 15615271.

It is an arithmetic number, because the mean of its divisors is an integer number (15615271).

Almost surely, 2^31230541 is an apocalyptic number.

It is an amenable number.

31230541 is a deficient number, since it is larger than the sum of its proper divisors (1).

31230541 is an equidigital number, since it uses as much as digits as its factorization.

31230541 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 31230541 is about 5588.4292068523. The cubic root of 31230541 is about 314.9148707557.

Adding to 31230541 its reverse (14503213), we get a palindrome (45733754).

The spelling of 31230541 in words is "thirty-one million, two hundred thirty thousand, five hundred forty-one".