213231242540 has 96 divisors (see below), whose sum is σ = 459528588288. Its totient is φ = 83086848000.

The previous prime is 213231242507. The next prime is 213231242551. The reversal of 213231242540 is 45242132312.

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 31 ways as a sum of consecutive naturals, for example, 56155922 + ... + 56159718.

It is an arithmetic number, because the mean of its divisors is an integer number (4786756128).

Almost surely, 2^213231242540 is an apocalyptic number.

213231242540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

213231242540 is an abundant number, since it is smaller than the sum of its proper divisors (246297345748).

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

213231242540 is a wasteful number, since it uses less digits than its factorization.

213231242540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4299 (or 4297 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 29.

Adding to 213231242540 its reverse (45242132312), we get a palindrome (258473374852).

The spelling of 213231242540 in words is "two hundred thirteen billion, two hundred thirty-one million, two hundred forty-two thousand, five hundred forty".