212469645 has 16 divisors (see below), whose sum is σ = 340179840. Its totient is φ = 113241024.

The previous prime is 212469643. The next prime is 212469683. The reversal of 212469645 is 546964212.

It is a happy number.

It is not a de Polignac number, because 212469645 - 2¹ = 212469643 is a prime.

It is a super-3 number, since 3×212469645³ (a number of 26 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212469643) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 23871 + ... + 31539.

It is an arithmetic number, because the mean of its divisors is an integer number (21261240).

Almost surely, 2^212469645 is an apocalyptic number.

It is an amenable number.

212469645 is a deficient number, since it is larger than the sum of its proper divisors (127710195).

212469645 is a wasteful number, since it uses less digits than its factorization.

212469645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9524.

The product of its digits is 103680, while the sum is 39.

The square root of 212469645 is about 14576.3385320183. The cubic root of 212469645 is about 596.7131803500.

The spelling of 212469645 in words is "two hundred twelve million, four hundred sixty-nine thousand, six hundred forty-five".