19872215 has 8 divisors (see below), whose sum is σ = 26014608. Its totient is φ = 14452480.

The previous prime is 19872197. The next prime is 19872217. The reversal of 19872215 is 51227891.

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

It is not a de Polignac number, because 19872215 - 2¹⁰ = 19871191 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 (19872217) 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, 180602 + ... + 180711.

It is an arithmetic number, because the mean of its divisors is an integer number (3251826).

Almost surely, 2^19872215 is an apocalyptic number.

19872215 is a deficient number, since it is larger than the sum of its proper divisors (6142393).

19872215 is a wasteful number, since it uses less digits than its factorization.

19872215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 361329.

The product of its digits is 10080, while the sum is 35.

The square root of 19872215 is about 4457.8262639991. The cubic root of 19872215 is about 270.8624229635.

The spelling of 19872215 in words is "nineteen million, eight hundred seventy-two thousand, two hundred fifteen".