215425144 has 16 divisors (see below), whose sum is σ = 440642520. Its totient is φ = 97920480.

The previous prime is 215425127. The next prime is 215425163. The reversal of 215425144 is 441524512.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1223919 + ... + 1224094.

Almost surely, 2^215425144 is an apocalyptic number.

It is an amenable number.

215425144 is an abundant number, since it is smaller than the sum of its proper divisors (225217376).

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

215425144 is a wasteful number, since it uses less digits than its factorization.

215425144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2448030 (or 2448026 counting only the distinct ones).

The product of its digits is 6400, while the sum is 28.

The square root of 215425144 is about 14677.3684289794. The cubic root of 215425144 is about 599.4672530337.

Adding to 215425144 its reverse (441524512), we get a palindrome (656949656).

The spelling of 215425144 in words is "two hundred fifteen million, four hundred twenty-five thousand, one hundred forty-four".