61550117 has 2 divisors, whose sum is σ = 61550118. Its totient is φ = 61550116.

The previous prime is 61550087. The next prime is 61550147. The reversal of 61550117 is 71105516.

It is a balanced prime because it is at equal distance from previous prime (61550087) and next prime (61550147).

It can be written as a sum of positive squares in only one way, i.e., 54184321 + 7365796 = 7361^2 + 2714^2 .

It is a cyclic number.

It is not a de Polignac number, because 61550117 - 2⁶ = 61550053 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61550147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30775058 + 30775059.

It is an arithmetic number, because the mean of its divisors is an integer number (30775059).

Almost surely, 2^61550117 is an apocalyptic number.

It is an amenable number.

61550117 is a deficient number, since it is larger than the sum of its proper divisors (1).

61550117 is an equidigital number, since it uses as much as digits as its factorization.

61550117 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1050, while the sum is 26.

The square root of 61550117 is about 7845.3882631773. The cubic root of 61550117 is about 394.8295306716.

The spelling of 61550117 in words is "sixty-one million, five hundred fifty thousand, one hundred seventeen".