210040215 has 96 divisors (see below), whose sum is σ = 432988416. Its totient is φ = 85962240.

The previous prime is 210040213. The next prime is 210040241. The reversal of 210040215 is 512040012.

It is not a de Polignac number, because 210040215 - 2¹ = 210040213 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a junction number, because it is equal to n+sod(n) for n = 210040194 and 210040203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210040213) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 670899 + ... + 671211.

It is an arithmetic number, because the mean of its divisors is an integer number (4510296).

Almost surely, 2^210040215 is an apocalyptic number.

210040215 is an abundant number, since it is smaller than the sum of its proper divisors (222948201).

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

210040215 is a wasteful number, since it uses less digits than its factorization.

210040215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 429 (or 422 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 15.

The square root of 210040215 is about 14492.7642290903. The cubic root of 210040215 is about 594.4301348897.

Adding to 210040215 its reverse (512040012), we get a palindrome (722080227).

The spelling of 210040215 in words is "two hundred ten million, forty thousand, two hundred fifteen".