61306222 has 4 divisors (see below), whose sum is σ = 91959336. Its totient is φ = 30653110.

The previous prime is 61306187. The next prime is 61306241. The reversal of 61306222 is 22260316.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 61306193 and 61306202.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 15326554 + ... + 15326557.

It is an arithmetic number, because the mean of its divisors is an integer number (22989834).

Almost surely, 2^61306222 is an apocalyptic number.

61306222 is a deficient number, since it is larger than the sum of its proper divisors (30653114).

61306222 is a wasteful number, since it uses less digits than its factorization.

61306222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30653113.

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 61306222 is about 7829.8289891925. The cubic root of 61306222 is about 394.3073306204.

Adding to 61306222 its reverse (22260316), we get a palindrome (83566538).

The spelling of 61306222 in words is "sixty-one million, three hundred six thousand, two hundred twenty-two".