61216049 has 2 divisors, whose sum is σ = 61216050. Its totient is φ = 61216048.

The previous prime is 61216033. The next prime is 61216063. The reversal of 61216049 is 94061216.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 60341824 + 874225 = 7768^2 + 935^2 .

It is a cyclic number.

It is not a de Polignac number, because 61216049 - 2⁴ = 61216033 is a prime.

It is not a weakly prime, because it can be changed into another prime (61216349) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30608024 + 30608025.

It is an arithmetic number, because the mean of its divisors is an integer number (30608025).

Almost surely, 2^61216049 is an apocalyptic number.

It is an amenable number.

61216049 is a deficient number, since it is larger than the sum of its proper divisors (1).

61216049 is an equidigital number, since it uses as much as digits as its factorization.

61216049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 61216049 is about 7824.0685707629. The cubic root of 61216049 is about 394.1139118525.

It can be divided in two parts, 612 and 16049, that added together give a palindrome (16661).

The spelling of 61216049 in words is "sixty-one million, two hundred sixteen thousand, forty-nine".