215023489 has 8 divisors (see below), whose sum is σ = 217540008. Its totient is φ = 212513280.

The previous prime is 215023469. The next prime is 215023493. The reversal of 215023489 is 984320512.

It can be written as a sum of positive squares in 4 ways, for example, as 84492864 + 130530625 = 9192^2 + 11425^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 215023489 - 2¹⁷ = 214892417 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (215023469) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 113619 + ... + 115495.

It is an arithmetic number, because the mean of its divisors is an integer number (27192501).

Almost surely, 2^215023489 is an apocalyptic number.

It is an amenable number.

215023489 is a deficient number, since it is larger than the sum of its proper divisors (2516519).

215023489 is a wasteful number, since it uses less digits than its factorization.

215023489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3155.

The product of its (nonzero) digits is 17280, while the sum is 34.

The square root of 215023489 is about 14663.6792449917. The cubic root of 215023489 is about 599.0944571560.

It can be divided in two parts, 215023 and 489, that added together give a palindrome (215512).

The spelling of 215023489 in words is "two hundred fifteen million, twenty-three thousand, four hundred eighty-nine".