61231201 has 2 divisors, whose sum is σ = 61231202. Its totient is φ = 61231200.

The previous prime is 61231193. The next prime is 61231213. The reversal of 61231201 is 10213216.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 61230625 + 576 = 7825^2 + 24^2 .

It is a cyclic number.

It is not a de Polignac number, because 61231201 - 2³ = 61231193 is a prime.

It is not a weakly prime, because it can be changed into another prime (61231301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30615600 + 30615601.

It is an arithmetic number, because the mean of its divisors is an integer number (30615601).

Almost surely, 2^61231201 is an apocalyptic number.

It is an amenable number.

61231201 is a deficient number, since it is larger than the sum of its proper divisors (1).

61231201 is an equidigital number, since it uses as much as digits as its factorization.

61231201 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 61231201 is about 7825.0368050253. The cubic root of 61231201 is about 394.1464257736.

Adding to 61231201 its reverse (10213216), we get a palindrome (71444417).

It can be divided in two parts, 612 and 31201, that added together give a palindrome (31813).

The spelling of 61231201 in words is "sixty-one million, two hundred thirty-one thousand, two hundred one".