61516249 has 2 divisors, whose sum is σ = 61516250. Its totient is φ = 61516248.

The previous prime is 61516223. The next prime is 61516267. The reversal of 61516249 is 94261516.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 61512649 + 3600 = 7843^2 + 60^2 .

It is a cyclic number.

It is not a de Polignac number, because 61516249 - 2⁹ = 61515737 is a prime.

It is a zygodrome in base 5.

It is not a weakly prime, because it can be changed into another prime (61516349) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30758124 + 30758125.

It is an arithmetic number, because the mean of its divisors is an integer number (30758125).

Almost surely, 2^61516249 is an apocalyptic number.

It is an amenable number.

61516249 is a deficient number, since it is larger than the sum of its proper divisors (1).

61516249 is an equidigital number, since it uses as much as digits as its factorization.

61516249 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12960, while the sum is 34.

The square root of 61516249 is about 7843.2295006585. The cubic root of 61516249 is about 394.7570989654.

The spelling of 61516249 in words is "sixty-one million, five hundred sixteen thousand, two hundred forty-nine".