215138007 has 48 divisors (see below), whose sum is σ = 376197120. Its totient is φ = 115732800.

The previous prime is 215137999. The next prime is 215138039. The reversal of 215138007 is 700831512.

It is not a de Polignac number, because 215138007 - 2³ = 215137999 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215138107) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 228157 + ... + 229097.

It is an arithmetic number, because the mean of its divisors is an integer number (7837440).

Almost surely, 2^215138007 is an apocalyptic number.

215138007 is a deficient number, since it is larger than the sum of its proper divisors (161059113).

215138007 is a wasteful number, since it uses less digits than its factorization.

215138007 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1164 (or 1161 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 27.

The square root of 215138007 is about 14667.5835433107. The cubic root of 215138007 is about 599.2007942563.

Adding to 215138007 its reverse (700831512), we get a palindrome (915969519).

The spelling of 215138007 in words is "two hundred fifteen million, one hundred thirty-eight thousand, seven".