213124443440 has 80 divisors (see below), whose sum is σ = 496618214400. Its totient is φ = 85060135680.

The previous prime is 213124443419. The next prime is 213124443479. The reversal of 213124443440 is 44344421312.

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

It is a junction number, because it is equal to n+sod(n) for n = 213124443397 and 213124443406.

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, 115388597 + ... + 115390443.

It is an arithmetic number, because the mean of its divisors is an integer number (6207727680).

Almost surely, 2^213124443440 is an apocalyptic number.

213124443440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

213124443440 is an abundant number, since it is smaller than the sum of its proper divisors (283493770960).

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

213124443440 is a wasteful number, since it uses less digits than its factorization.

213124443440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4290 (or 4284 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 32.

Adding to 213124443440 its reverse (44344421312), we get a palindrome (257468864752).

The spelling of 213124443440 in words is "two hundred thirteen billion, one hundred twenty-four million, four hundred forty-three thousand, four hundred forty".