219240131 has 4 divisors (see below), whose sum is σ = 239171064. Its totient is φ = 199309200.

The previous prime is 219240127. The next prime is 219240137. The reversal of 219240131 is 131042912.

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

It is a cyclic number.

It is not a de Polignac number, because 219240131 - 2² = 219240127 is a prime.

It is a super-2 number, since 2×219240131² = 96132470081794322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 219240097 and 219240106.

It is not an unprimeable number, because it can be changed into a prime (219240137) 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 3 ways as a sum of consecutive naturals, for example, 9965450 + ... + 9965471.

It is an arithmetic number, because the mean of its divisors is an integer number (59792766).

Almost surely, 2^219240131 is an apocalyptic number.

219240131 is a deficient number, since it is larger than the sum of its proper divisors (19930933).

219240131 is a wasteful number, since it uses less digits than its factorization.

219240131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19930932.

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 219240131 is about 14806.7596387596. The cubic root of 219240131 is about 602.9852438619.

The spelling of 219240131 in words is "two hundred nineteen million, two hundred forty thousand, one hundred thirty-one".