61222505 has 4 divisors (see below), whose sum is σ = 73467012. Its totient is φ = 48978000.

The previous prime is 61222439. The next prime is 61222507. The reversal of 61222505 is 50522216.

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 17172736 + 44049769 = 4144^2 + 6637^2 .

It is a de Polignac number, because none of the positive numbers 2^k-61222505 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61222507) 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, 6122246 + ... + 6122255.

It is an arithmetic number, because the mean of its divisors is an integer number (18366753).

Almost surely, 2^61222505 is an apocalyptic number.

It is an amenable number.

61222505 is a deficient number, since it is larger than the sum of its proper divisors (12244507).

61222505 is a wasteful number, since it uses less digits than its factorization.

61222505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12244506.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 61222505 is about 7824.4811329570. The cubic root of 61222505 is about 394.1277661168.

The spelling of 61222505 in words is "sixty-one million, two hundred twenty-two thousand, five hundred five".