212513145 has 32 divisors (see below), whose sum is σ = 367852800. Its totient is φ = 104143104.

The previous prime is 212513143. The next prime is 212513177. The reversal of 212513145 is 541315212.

It is a happy number.

It is not a de Polignac number, because 212513145 - 2¹ = 212513143 is a prime.

It is not an unprimeable number, because it can be changed into a prime (212513143) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 42276 + ... + 47034.

It is an arithmetic number, because the mean of its divisors is an integer number (11495400).

Almost surely, 2^212513145 is an apocalyptic number.

It is an amenable number.

212513145 is a deficient number, since it is larger than the sum of its proper divisors (155339655).

212513145 is a wasteful number, since it uses less digits than its factorization.

212513145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5009.

The product of its digits is 1200, while the sum is 24.

The square root of 212513145 is about 14577.8305999212. The cubic root of 212513145 is about 596.7539002877.

Adding to 212513145 its reverse (541315212), we get a palindrome (753828357).

The spelling of 212513145 in words is "two hundred twelve million, five hundred thirteen thousand, one hundred forty-five".