219135941 has 4 divisors (see below), whose sum is σ = 225058572. Its totient is φ = 213213312.

The previous prime is 219135937. The next prime is 219135991. The reversal of 219135941 is 149531912.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 166152100 + 52983841 = 12890^2 + 7279^2 .

It is a cyclic number.

It is not a de Polignac number, because 219135941 - 2² = 219135937 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 (219135991) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2961260 + ... + 2961333.

It is an arithmetic number, because the mean of its divisors is an integer number (56264643).

Almost surely, 2^219135941 is an apocalyptic number.

It is an amenable number.

219135941 is a deficient number, since it is larger than the sum of its proper divisors (5922631).

219135941 is an equidigital number, since it uses as much as digits as its factorization.

219135941 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5922630.

The product of its digits is 9720, while the sum is 35.

The square root of 219135941 is about 14803.2408951554. The cubic root of 219135941 is about 602.8897093642.

The spelling of 219135941 in words is "two hundred nineteen million, one hundred thirty-five thousand, nine hundred forty-one".