213255445520 has 80 divisors (see below), whose sum is σ = 551183388672. Its totient is φ = 76200445440.

The previous prime is 213255445517. The next prime is 213255445531. The reversal of 213255445520 is 25544552312.

It is a tau number, because it is divible by the number of its divisors (80).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3275072 + ... + 3339551.

Almost surely, 2^213255445520 is an apocalyptic number.

213255445520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

213255445520 is an abundant number, since it is smaller than the sum of its proper divisors (337927943152).

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

213255445520 is a wasteful number, since it uses less digits than its factorization.

213255445520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6614680 (or 6614674 counting only the distinct ones).

The product of its (nonzero) digits is 240000, while the sum is 38.

Adding to 213255445520 its reverse (25544552312), we get a palindrome (238799997832).

The spelling of 213255445520 in words is "two hundred thirteen billion, two hundred fifty-five million, four hundred forty-five thousand, five hundred twenty".