215135154 has 24 divisors (see below), whose sum is σ = 501982572. Its totient is φ = 66195360.

The previous prime is 215135147. The next prime is 215135177. The reversal of 215135154 is 451531512.

It can be written as a sum of positive squares in 2 ways, for example, as 199572129 + 15563025 = 14127^2 + 3945^2 .

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, 459457 + ... + 459924.

Almost surely, 2^215135154 is an apocalyptic number.

215135154 is an abundant number, since it is smaller than the sum of its proper divisors (286847418).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

215135154 is a wasteful number, since it uses less digits than its factorization.

215135154 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 919402 (or 919399 counting only the distinct ones).

The product of its digits is 3000, while the sum is 27.

The square root of 215135154 is about 14667.4862877045. The cubic root of 215135154 is about 599.1981455264.

Adding to 215135154 its reverse (451531512), we get a palindrome (666666666).

The spelling of 215135154 in words is "two hundred fifteen million, one hundred thirty-five thousand, one hundred fifty-four".