215425138 has 8 divisors (see below), whose sum is σ = 333561600. Its totient is φ = 104237940.

The previous prime is 215425127. The next prime is 215425163. The reversal of 215425138 is 831524512.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is an unprimeable number.

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, 1737238 + ... + 1737361.

It is an arithmetic number, because the mean of its divisors is an integer number (41695200).

Almost surely, 2^215425138 is an apocalyptic number.

215425138 is a deficient number, since it is larger than the sum of its proper divisors (118136462).

215425138 is a wasteful number, since it uses less digits than its factorization.

215425138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3474632.

The product of its digits is 9600, while the sum is 31.

The square root of 215425138 is about 14677.3682245830. The cubic root of 215425138 is about 599.4672474683.

The spelling of 215425138 in words is "two hundred fifteen million, four hundred twenty-five thousand, one hundred thirty-eight".