215023471 has 16 divisors (see below), whose sum is σ = 242341120. Its totient is φ = 189423360.

The previous prime is 215023469. The next prime is 215023493. The reversal of 215023471 is 174320512.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 215023471 - 2¹ = 215023469 is a prime.

It is a super-3 number, since 3×215023471³ (a number of 26 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215023411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25765 + ... + 33073.

It is an arithmetic number, because the mean of its divisors is an integer number (15146320).

Almost surely, 2^215023471 is an apocalyptic number.

215023471 is a deficient number, since it is larger than the sum of its proper divisors (27317649).

215023471 is a wasteful number, since it uses less digits than its factorization.

215023471 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7426.

The product of its (nonzero) digits is 1680, while the sum is 25.

The square root of 215023471 is about 14663.6786312303. The cubic root of 215023471 is about 599.0944404389.

Adding to 215023471 its reverse (174320512), we get a palindrome (389343983).

The spelling of 215023471 in words is "two hundred fifteen million, twenty-three thousand, four hundred seventy-one".