212054215445 has 8 divisors (see below), whose sum is σ = 254759924736. Its totient is φ = 169446794896.

The previous prime is 212054215423. The next prime is 212054215447. The reversal of 212054215445 is 544512450212.

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 212054215445 - 2⁶ = 212054215381 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212054215447) 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, 24567437 + ... + 24576066.

It is an arithmetic number, because the mean of its divisors is an integer number (31844990592).

Almost surely, 2^212054215445 is an apocalyptic number.

It is an amenable number.

212054215445 is a deficient number, since it is larger than the sum of its proper divisors (42705709291).

212054215445 is an equidigital number, since it uses as much as digits as its factorization.

212054215445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49144371.

The product of its (nonzero) digits is 64000, while the sum is 35.

Adding to 212054215445 its reverse (544512450212), we get a palindrome (756566665657).

The spelling of 212054215445 in words is "two hundred twelve billion, fifty-four million, two hundred fifteen thousand, four hundred forty-five".