213105321546 has 24 divisors (see below), whose sum is σ = 461518035840. Its totient is φ = 65570867856.

The previous prime is 213105321461. The next prime is 213105321571. The reversal of 213105321546 is 645123501312.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 105080506 + ... + 105082533.

It is an arithmetic number, because the mean of its divisors is an integer number (19229918160).

Almost surely, 2^213105321546 is an apocalyptic number.

213105321546 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

213105321546 is an abundant number, since it is smaller than the sum of its proper divisors (248412714294).

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

213105321546 is a wasteful number, since it uses less digits than its factorization.

213105321546 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210163070 (or 210163057 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 33.

Adding to 213105321546 its reverse (645123501312), we get a palindrome (858228822858).

The spelling of 213105321546 in words is "two hundred thirteen billion, one hundred five million, three hundred twenty-one thousand, five hundred forty-six".