215240135 has 16 divisors (see below), whose sum is σ = 285634080. Its totient is φ = 154391040.

The previous prime is 215240093. The next prime is 215240143. The reversal of 215240135 is 531042512.

It is not a de Polignac number, because 215240135 - 2⁶ = 215240071 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 215240135.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22790 + ... + 30819.

It is an arithmetic number, because the mean of its divisors is an integer number (17852130).

Almost surely, 2^215240135 is an apocalyptic number.

215240135 is a deficient number, since it is larger than the sum of its proper divisors (70393945).

215240135 is a wasteful number, since it uses less digits than its factorization.

215240135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53698.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 215240135 is about 14671.0645489685. The cubic root of 215240135 is about 599.2955946417.

Adding to 215240135 its reverse (531042512), we get a palindrome (746282647).

The spelling of 215240135 in words is "two hundred fifteen million, two hundred forty thousand, one hundred thirty-five".