212504561755 has 8 divisors (see below), whose sum is σ = 257481256032. Its totient is φ = 168353128128.

The previous prime is 212504561741. The next prime is 212504561803. The reversal of 212504561755 is 557165405212.

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

It is a cyclic number.

It is not a de Polignac number, because 212504561755 - 2¹⁷ = 212504430683 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 206314594 + ... + 206315623.

It is an arithmetic number, because the mean of its divisors is an integer number (32185157004).

Almost surely, 2^212504561755 is an apocalyptic number.

212504561755 is a deficient number, since it is larger than the sum of its proper divisors (44976694277).

212504561755 is a wasteful number, since it uses less digits than its factorization.

212504561755 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 412630325.

The product of its (nonzero) digits is 420000, while the sum is 43.

Adding to 212504561755 its reverse (557165405212), we get a palindrome (769669966967).

The spelling of 212504561755 in words is "two hundred twelve billion, five hundred four million, five hundred sixty-one thousand, seven hundred fifty-five".