61478221 has 8 divisors (see below), whose sum is σ = 70693184. Its totient is φ = 52371360.

The previous prime is 61478203. The next prime is 61478227. The reversal of 61478221 is 12287416.

61478221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 61478221 - 2¹⁵ = 61445453 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61478227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25800 + ... + 28081.

It is an arithmetic number, because the mean of its divisors is an integer number (8836648).

Almost surely, 2^61478221 is an apocalyptic number.

It is an amenable number.

61478221 is a deficient number, since it is larger than the sum of its proper divisors (9214963).

61478221 is a wasteful number, since it uses less digits than its factorization.

61478221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54051.

The product of its digits is 5376, while the sum is 31.

The square root of 61478221 is about 7840.8048693996. The cubic root of 61478221 is about 394.6757387959.

The spelling of 61478221 in words is "sixty-one million, four hundred seventy-eight thousand, two hundred twenty-one".