219995412 has 72 divisors (see below), whose sum is σ = 635294016. Its totient is φ = 58017024.

The previous prime is 219995387. The next prime is 219995431. The reversal of 219995412 is 214599912.

219995412 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6448 + ... + 21944.

It is an arithmetic number, because the mean of its divisors is an integer number (8823528).

Almost surely, 2^219995412 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 219995412, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (317647008).

219995412 is an abundant number, since it is smaller than the sum of its proper divisors (415298604).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

219995412 is a wasteful number, since it uses less digits than its factorization.

219995412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15537 (or 15522 counting only the distinct ones).

The product of its digits is 58320, while the sum is 42.

The square root of 219995412 is about 14832.2423119365. The cubic root of 219995412 is about 603.6768771525.

The spelling of 219995412 in words is "two hundred nineteen million, nine hundred ninety-five thousand, four hundred twelve".