61643222 has 4 divisors (see below), whose sum is σ = 92464836. Its totient is φ = 30821610.

The previous prime is 61643191. The next prime is 61643297. The reversal of 61643222 is 22234616.

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

It is a junction number, because it is equal to n+sod(n) for n = 61643191 and 61643200.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15410804 + ... + 15410807.

It is an arithmetic number, because the mean of its divisors is an integer number (23116209).

Almost surely, 2^61643222 is an apocalyptic number.

61643222 is a deficient number, since it is larger than the sum of its proper divisors (30821614).

61643222 is a wasteful number, since it uses less digits than its factorization.

61643222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30821613.

The product of its digits is 3456, while the sum is 26.

The square root of 61643222 is about 7851.3197616706. The cubic root of 61643222 is about 395.0285126029.

Adding to 61643222 its reverse (22234616), we get a palindrome (83877838).

The spelling of 61643222 in words is "sixty-one million, six hundred forty-three thousand, two hundred twenty-two".