219475866148131 has 4 divisors (see below), whose sum is σ = 292634488197512. Its totient is φ = 146317244098752.

The previous prime is 219475866148127. The next prime is 219475866148139. The reversal of 219475866148131 is 131841668574912.

It is a happy number.

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

It is not a de Polignac number, because 219475866148131 - 2² = 219475866148127 is a prime.

It is a super-2 number, since 2×219475866148131² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (219475866148139) 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, 36579311024686 + ... + 36579311024691.

It is an arithmetic number, because the mean of its divisors is an integer number (73158622049378).

Almost surely, 2^{219475866148131} is an apocalyptic number.

219475866148131 is a deficient number, since it is larger than the sum of its proper divisors (73158622049381).

219475866148131 is an equidigital number, since it uses as much as digits as its factorization.

219475866148131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73158622049380.

The product of its digits is 69672960, while the sum is 66.

The spelling of 219475866148131 in words is "two hundred nineteen trillion, four hundred seventy-five billion, eight hundred sixty-six million, one hundred forty-eight thousand, one hundred thirty-one".