61221303 has 24 divisors (see below), whose sum is σ = 103892880. Its totient is φ = 34248960.

The previous prime is 61221229. The next prime is 61221313. The reversal of 61221303 is 30312216.

61221303 is a `hidden beast` number, since 612 + 21 + 30 + 3 = 666.

It is not a de Polignac number, because 61221303 - 2⁸ = 61221047 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61221313) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 22498 + ... + 25071.

It is an arithmetic number, because the mean of its divisors is an integer number (4328870).

Almost surely, 2^61221303 is an apocalyptic number.

61221303 is a deficient number, since it is larger than the sum of its proper divisors (42671577).

61221303 is a wasteful number, since it uses less digits than its factorization.

61221303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47599 (or 47596 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 61221303 is about 7824.4043223750. The cubic root of 61221303 is about 394.1251867566.

Adding to 61221303 its reverse (30312216), we get a palindrome (91533519).

The spelling of 61221303 in words is "sixty-one million, two hundred twenty-one thousand, three hundred three".