61339221 has 16 divisors (see below), whose sum is σ = 92365120. Its totient is φ = 40221360.

The previous prime is 61339181. The next prime is 61339249. The reversal of 61339221 is 12293316.

It is not a de Polignac number, because 61339221 - 2⁷ = 61339093 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61339261) 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 15 ways as a sum of consecutive naturals, for example, 16975 + ... + 20268.

It is an arithmetic number, because the mean of its divisors is an integer number (5772820).

Almost surely, 2^61339221 is an apocalyptic number.

61339221 is a gapful number since it is divisible by the number (61) formed by its first and last digit.

It is an amenable number.

61339221 is a deficient number, since it is larger than the sum of its proper divisors (31025899).

61339221 is a wasteful number, since it uses less digits than its factorization.

61339221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37313 (or 37307 counting only the distinct ones).

The product of its digits is 1944, while the sum is 27.

The square root of 61339221 is about 7831.9359675626. The cubic root of 61339221 is about 394.3780652228.

The spelling of 61339221 in words is "sixty-one million, three hundred thirty-nine thousand, two hundred twenty-one".