219138052225 has 12 divisors (see below), whose sum is σ = 276336799920. Its totient is φ = 172339077200.

The previous prime is 219138052201. The next prime is 219138052247. The reversal of 219138052225 is 522250831912.

It is not a de Polignac number, because 219138052225 - 2⁷ = 219138052097 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 74282611 + ... + 74285560.

It is an arithmetic number, because the mean of its divisors is an integer number (23028066660).

Almost surely, 2^219138052225 is an apocalyptic number.

219138052225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

219138052225 is a deficient number, since it is larger than the sum of its proper divisors (57198747695).

219138052225 is a wasteful number, since it uses less digits than its factorization.

219138052225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148568240 (or 148568235 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 40.

The spelling of 219138052225 in words is "two hundred nineteen billion, one hundred thirty-eight million, fifty-two thousand, two hundred twenty-five".