212530554 has 20 divisors (see below), whose sum is σ = 476226234. Its totient is φ = 70843464.

The previous prime is 212530543. The next prime is 212530559. The reversal of 212530554 is 455035212.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 178623225 + 33907329 = 13365^2 + 5823^2 .

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (212530559) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 655797 + ... + 656120.

Almost surely, 2^212530554 is an apocalyptic number.

212530554 is an abundant number, since it is smaller than the sum of its proper divisors (263695680).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

212530554 is a wasteful number, since it uses less digits than its factorization.

212530554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1311931 (or 1311922 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 27.

The square root of 212530554 is about 14578.4276929990. The cubic root of 212530554 is about 596.7701951306.

Adding to 212530554 its reverse (455035212), we get a palindrome (667565766).

The spelling of 212530554 in words is "two hundred twelve million, five hundred thirty thousand, five hundred fifty-four".