212511045 has 16 divisors (see below), whose sum is σ = 350986752. Its totient is φ = 109682880.

The previous prime is 212511041. The next prime is 212511059. The reversal of 212511045 is 540115212.

It is not a de Polignac number, because 212511045 - 2² = 212511041 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212511041) 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, 228042 + ... + 228971.

It is an arithmetic number, because the mean of its divisors is an integer number (21936672).

Almost surely, 2^212511045 is an apocalyptic number.

It is an amenable number.

212511045 is a deficient number, since it is larger than the sum of its proper divisors (138475707).

212511045 is a wasteful number, since it uses less digits than its factorization.

212511045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 457052.

The product of its (nonzero) digits is 400, while the sum is 21.

The square root of 212511045 is about 14577.7585725653. The cubic root of 212511045 is about 596.7519346252.

Adding to 212511045 its reverse (540115212), we get a palindrome (752626257).

The spelling of 212511045 in words is "two hundred twelve million, five hundred eleven thousand, forty-five".