212306545 has 16 divisors (see below), whose sum is σ = 280687680. Its totient is φ = 152872000.

The previous prime is 212306539. The next prime is 212306561. The reversal of 212306545 is 545603212.

212306545 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 212306545 - 2²¹ = 210209393 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13555 + ... + 24664.

It is an arithmetic number, because the mean of its divisors is an integer number (17542980).

Almost surely, 2^212306545 is an apocalyptic number.

It is an amenable number.

212306545 is a deficient number, since it is larger than the sum of its proper divisors (68381135).

212306545 is a wasteful number, since it uses less digits than its factorization.

212306545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38336.

The product of its (nonzero) digits is 7200, while the sum is 28.

The square root of 212306545 is about 14570.7427744779. The cubic root of 212306545 is about 596.5604544809.

Adding to 212306545 its reverse (545603212), we get a palindrome (757909757).

The spelling of 212306545 in words is "two hundred twelve million, three hundred six thousand, five hundred forty-five".