47220919 has 8 divisors (see below), whose sum is σ = 47900160. Its totient is φ = 46546296.

The previous prime is 47220839. The next prime is 47220949. The reversal of 47220919 is 91902274.

It is a happy number.

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 47220919 - 2¹⁹ = 46696631 is a prime.

It is a super-2 number, since 2×47220919² = 4459630382409122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47220949) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22872 + ... + 24850.

It is an arithmetic number, because the mean of its divisors is an integer number (5987520).

Almost surely, 2^47220919 is an apocalyptic number.

47220919 is a deficient number, since it is larger than the sum of its proper divisors (679241).

47220919 is a wasteful number, since it uses less digits than its factorization.

47220919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2309.

The product of its (nonzero) digits is 9072, while the sum is 34.

The square root of 47220919 is about 6871.7478853637. The cubic root of 47220919 is about 361.4471557835.

The spelling of 47220919 in words is "forty-seven million, two hundred twenty thousand, nine hundred nineteen".