61550105 has 4 divisors (see below), whose sum is σ = 73860132. Its totient is φ = 49240080.

The previous prime is 61550087. The next prime is 61550117. The reversal of 61550105 is 50105516.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 43665664 + 17884441 = 6608^2 + 4229^2 .

It is not a de Polignac number, because 61550105 - 2¹⁶ = 61484569 is a prime.

It is a super-2 number, since 2×61550105² = 7576830851022050, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6155006 + ... + 6155015.

It is an arithmetic number, because the mean of its divisors is an integer number (18465033).

Almost surely, 2^61550105 is an apocalyptic number.

It is an amenable number.

61550105 is a deficient number, since it is larger than the sum of its proper divisors (12310027).

61550105 is a wasteful number, since it uses less digits than its factorization.

61550105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12310026.

The product of its (nonzero) digits is 750, while the sum is 23.

The square root of 61550105 is about 7845.3874983967. The cubic root of 61550105 is about 394.8295050125.

The spelling of 61550105 in words is "sixty-one million, five hundred fifty thousand, one hundred five".