215154 has 12 divisors (see below), whose sum is σ = 466206. Its totient is φ = 71712.

The previous prime is 215153. The next prime is 215161. The reversal of 215154 is 451512.

It can be written as a sum of positive squares in only one way, i.e., 140625 + 74529 = 375^2 + 273^2 .

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 11953 = 215154 / (2 + 1 + 5 + 1 + 5 + 4).

It is not an unprimeable number, because it can be changed into a prime (215153) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5959 + ... + 5994.

2²¹⁵¹⁵⁴ is an apocalyptic number.

215154 is an abundant number, since it is smaller than the sum of its proper divisors (251052).

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

215154 is a wasteful number, since it uses less digits than its factorization.

215154 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11961 (or 11958 counting only the distinct ones).

The product of its digits is 200, while the sum is 18.

The square root of 215154 is about 463.8469575194. The cubic root of 215154 is about 59.9215641750.

Adding to 215154 its reverse (451512), we get a palindrome (666666).

The spelling of 215154 in words is "two hundred fifteen thousand, one hundred fifty-four".