61135205 has 4 divisors (see below), whose sum is σ = 73362252. Its totient is φ = 48908160.

The previous prime is 61135201. The next prime is 61135231. The reversal of 61135205 is 50253116.

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 11826721 + 49308484 = 3439^2 + 7022^2 .

It is not a de Polignac number, because 61135205 - 2² = 61135201 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61135201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6113516 + ... + 6113525.

It is an arithmetic number, because the mean of its divisors is an integer number (18340563).

Almost surely, 2^61135205 is an apocalyptic number.

It is an amenable number.

61135205 is a deficient number, since it is larger than the sum of its proper divisors (12227047).

61135205 is a wasteful number, since it uses less digits than its factorization.

61135205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12227046.

The product of its (nonzero) digits is 900, while the sum is 23.

The square root of 61135205 is about 7818.9004981519. The cubic root of 61135205 is about 393.9403420027.

The spelling of 61135205 in words is "sixty-one million, one hundred thirty-five thousand, two hundred five".