61103257 has 2 divisors, whose sum is σ = 61103258. Its totient is φ = 61103256.

The previous prime is 61103213. The next prime is 61103267. The reversal of 61103257 is 75230116.

61103257 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 49617936 + 11485321 = 7044^2 + 3389^2 .

It is a cyclic number.

It is not a de Polignac number, because 61103257 - 2¹⁵ = 61070489 is a prime.

It is not a weakly prime, because it can be changed into another prime (61103267) 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, 30551628 + 30551629.

It is an arithmetic number, because the mean of its divisors is an integer number (30551629).

Almost surely, 2^61103257 is an apocalyptic number.

It is an amenable number.

61103257 is a deficient number, since it is larger than the sum of its proper divisors (1).

61103257 is an equidigital number, since it uses as much as digits as its factorization.

61103257 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1260, while the sum is 25.

The square root of 61103257 is about 7816.8572329294. The cubic root of 61103257 is about 393.8717083406.

The spelling of 61103257 in words is "sixty-one million, one hundred three thousand, two hundred fifty-seven".