213145145 has 8 divisors (see below), whose sum is σ = 257204160. Its totient is φ = 169562800.

The previous prime is 213145139. The next prime is 213145151. The reversal of 213145145 is 541541312.

213145145 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (213145139) and next prime (213145151).

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

It is not a de Polignac number, because 213145145 - 2¹⁰ = 213144121 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 118181 + ... + 119970.

It is an arithmetic number, because the mean of its divisors is an integer number (32150520).

Almost surely, 2^213145145 is an apocalyptic number.

It is an amenable number.

213145145 is a deficient number, since it is larger than the sum of its proper divisors (44059015).

213145145 is a wasteful number, since it uses less digits than its factorization.

213145145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 238335.

The product of its digits is 2400, while the sum is 26.

The square root of 213145145 is about 14599.4912582597. The cubic root of 213145145 is about 597.3448836673.

Adding to 213145145 its reverse (541541312), we get a palindrome (754686457).

The spelling of 213145145 in words is "two hundred thirteen million, one hundred forty-five thousand, one hundred forty-five".