213018445552 has 40 divisors (see below), whose sum is σ = 457874801280. Its totient is φ = 95185433280.

The previous prime is 213018445547. The next prime is 213018445561. The reversal of 213018445552 is 255544810312.

It is a happy number.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10246668 + ... + 10267435.

It is an arithmetic number, because the mean of its divisors is an integer number (11446870032).

Almost surely, 2^213018445552 is an apocalyptic number.

213018445552 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

213018445552 is an abundant number, since it is smaller than the sum of its proper divisors (244856355728).

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

213018445552 is a wasteful number, since it uses less digits than its factorization.

213018445552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20514181 (or 20514175 counting only the distinct ones).

The product of its (nonzero) digits is 192000, while the sum is 40.

The spelling of 213018445552 in words is "two hundred thirteen billion, eighteen million, four hundred forty-five thousand, five hundred fifty-two".