212315045 has 8 divisors (see below), whose sum is σ = 254872440. Its totient is φ = 169789120.

The previous prime is 212315041. The next prime is 212315053. The reversal of 212315045 is 540513212.

It can be written as a sum of positive squares in 4 ways, for example, as 37625956 + 174689089 = 6134^2 + 13217^2 .

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

It is not a de Polignac number, because 212315045 - 2² = 212315041 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 212315045.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212315041) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11171 + ... + 23439.

It is an arithmetic number, because the mean of its divisors is an integer number (31859055).

Almost surely, 2^212315045 is an apocalyptic number.

It is an amenable number.

212315045 is a deficient number, since it is larger than the sum of its proper divisors (42557395).

212315045 is a wasteful number, since it uses less digits than its factorization.

212315045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15735.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 212315045 is about 14571.0344519530. The cubic root of 212315045 is about 596.5684157619.

Adding to 212315045 its reverse (540513212), we get a palindrome (752828257).

The spelling of 212315045 in words is "two hundred twelve million, three hundred fifteen thousand, forty-five".