210215145 has 48 divisors (see below), whose sum is σ = 411877440. Its totient is φ = 91034496.

The previous prime is 210215087. The next prime is 210215153. The reversal of 210215145 is 541512012.

It is not a de Polignac number, because 210215145 - 2⁷ = 210215017 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

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 47 ways as a sum of consecutive naturals, for example, 6439 + ... + 21491.

It is an arithmetic number, because the mean of its divisors is an integer number (8580780).

Almost surely, 2^210215145 is an apocalyptic number.

It is an amenable number.

210215145 is a deficient number, since it is larger than the sum of its proper divisors (201662295).

210215145 is a wasteful number, since it uses less digits than its factorization.

210215145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15094 (or 15087 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 21.

The square root of 210215145 is about 14498.7980536319. The cubic root of 210215145 is about 594.5951109311.

Adding to 210215145 its reverse (541512012), we get a palindrome (751727157).

The spelling of 210215145 in words is "two hundred ten million, two hundred fifteen thousand, one hundred forty-five".