61222719 has 8 divisors (see below), whose sum is σ = 82253952. Its totient is φ = 40503320.

The previous prime is 61222703. The next prime is 61222747. The reversal of 61222719 is 91722216.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 61222719 - 2⁴ = 61222703 is a prime.

It is a super-2 number, since 2×61222719² = 7496442643505922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61222789) 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 7 ways as a sum of consecutive naturals, for example, 77499 + ... + 78284.

It is an arithmetic number, because the mean of its divisors is an integer number (10281744).

Almost surely, 2^61222719 is an apocalyptic number.

61222719 is a deficient number, since it is larger than the sum of its proper divisors (21031233).

61222719 is a wasteful number, since it uses less digits than its factorization.

61222719 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155917.

The product of its digits is 3024, while the sum is 30.

The square root of 61222719 is about 7824.4948079732. The cubic root of 61222719 is about 394.1282253338.

The spelling of 61222719 in words is "sixty-one million, two hundred twenty-two thousand, seven hundred nineteen".