212245153 has 8 divisors (see below), whose sum is σ = 227256840. Its totient is φ = 197514240.

The previous prime is 212245129. The next prime is 212245157. The reversal of 212245153 is 351542212.

It can be written as a sum of positive squares in 4 ways, for example, as 56295009 + 155950144 = 7503^2 + 12488^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212245153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212245157) 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 7 ways as a sum of consecutive naturals, for example, 68628 + ... + 71653.

It is an arithmetic number, because the mean of its divisors is an integer number (28407105).

Almost surely, 2^212245153 is an apocalyptic number.

It is an amenable number.

212245153 is a deficient number, since it is larger than the sum of its proper divisors (15011687).

212245153 is a wasteful number, since it uses less digits than its factorization.

212245153 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140387.

The product of its digits is 2400, while the sum is 25.

The square root of 212245153 is about 14568.6359347744. The cubic root of 212245153 is about 596.5029471156.

Adding to 212245153 its reverse (351542212), we get a palindrome (563787365).

The spelling of 212245153 in words is "two hundred twelve million, two hundred forty-five thousand, one hundred fifty-three".