215234154 has 12 divisors (see below), whose sum is σ = 466340706. Its totient is φ = 71744712.

The previous prime is 215234141. The next prime is 215234171. The reversal of 215234154 is 451432512.

215234154 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 185586129 + 29648025 = 13623^2 + 5445^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5978709 + ... + 5978744.

Almost surely, 2^215234154 is an apocalyptic number.

215234154 is an abundant number, since it is smaller than the sum of its proper divisors (251106552).

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

215234154 is a wasteful number, since it uses less digits than its factorization.

215234154 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11957461 (or 11957458 counting only the distinct ones).

The product of its digits is 4800, while the sum is 27.

The square root of 215234154 is about 14670.8607109467. The cubic root of 215234154 is about 599.2900436012.

Adding to 215234154 its reverse (451432512), we get a palindrome (666666666).

The spelling of 215234154 in words is "two hundred fifteen million, two hundred thirty-four thousand, one hundred fifty-four".