61222775 has 12 divisors (see below), whose sum is σ = 76056144. Its totient is φ = 48888000.

The previous prime is 61222771. The next prime is 61222781. The reversal of 61222775 is 57722216.

It is not a de Polignac number, because 61222775 - 2² = 61222771 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61222771) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13835 + ... + 17715.

It is an arithmetic number, because the mean of its divisors is an integer number (6338012).

Almost surely, 2^61222775 is an apocalyptic number.

61222775 is a deficient number, since it is larger than the sum of its proper divisors (14833369).

61222775 is a wasteful number, since it uses less digits than its factorization.

61222775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4522 (or 4517 counting only the distinct ones).

The product of its digits is 11760, while the sum is 32.

The square root of 61222775 is about 7824.4983864782. The cubic root of 61222775 is about 394.1283455026.

The spelling of 61222775 in words is "sixty-one million, two hundred twenty-two thousand, seven hundred seventy-five".