61311105 has 24 divisors (see below), whose sum is σ = 106461888. Its totient is φ = 32641056.

The previous prime is 61311091. The next prime is 61311137. The reversal of 61311105 is 50111316.

It is not a de Polignac number, because 61311105 - 2⁵ = 61311073 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 38964 + ... + 40506.

It is an arithmetic number, because the mean of its divisors is an integer number (4435912).

Almost surely, 2^61311105 is an apocalyptic number.

It is an amenable number.

61311105 is a deficient number, since it is larger than the sum of its proper divisors (45150783).

61311105 is a wasteful number, since it uses less digits than its factorization.

61311105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2437 (or 2434 counting only the distinct ones).

The product of its (nonzero) digits is 90, while the sum is 18.

The square root of 61311105 is about 7830.1408033317. The cubic root of 61311105 is about 394.3177991151.

It can be divided in two parts, 61311 and 105, that added together give a palindrome (61416).

The spelling of 61311105 in words is "sixty-one million, three hundred eleven thousand, one hundred five".