61220002 has 4 divisors (see below), whose sum is σ = 91830006. Its totient is φ = 30610000.

The previous prime is 61219999. The next prime is 61220021. The reversal of 61220002 is 20002216.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 46635241 + 14584761 = 6829^2 + 3819^2 .

It is a Smith number, since the sum of its digits (13) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15304999 + ... + 15305002.

Almost surely, 2^61220002 is an apocalyptic number.

61220002 is a deficient number, since it is larger than the sum of its proper divisors (30610004).

61220002 is a wasteful number, since it uses less digits than its factorization.

61220002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30610003.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 61220002 is about 7824.3211846140. The cubic root of 61220002 is about 394.1223949153.

Adding to 61220002 its reverse (20002216), we get a palindrome (81222218).

The spelling of 61220002 in words is "sixty-one million, two hundred twenty thousand, two".