215138050605 has 24 divisors (see below), whose sum is σ = 392532585120. Its totient is φ = 108701330400.

The previous prime is 215138050571. The next prime is 215138050613. The reversal of 215138050605 is 506050831512.

It is a happy number.

215138050605 is a `hidden beast` number, since 2 + 1 + 513 + 80 + 5 + 0 + 60 + 5 = 666.

It is not a de Polignac number, because 215138050605 - 2⁶ = 215138050541 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 215138050605.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 125810871 + ... + 125812580.

It is an arithmetic number, because the mean of its divisors is an integer number (16355524380).

Almost surely, 2^215138050605 is an apocalyptic number.

It is an amenable number.

215138050605 is a deficient number, since it is larger than the sum of its proper divisors (177394534515).

215138050605 is a wasteful number, since it uses less digits than its factorization.

215138050605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 251623481 (or 251623478 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 36.

The spelling of 215138050605 in words is "two hundred fifteen billion, one hundred thirty-eight million, fifty thousand, six hundred five".