213210302440 has 32 divisors (see below), whose sum is σ = 486883234080. Its totient is φ = 84011222592.

The previous prime is 213210302419. The next prime is 213210302441. The reversal of 213210302440 is 44203012312.

It is not an unprimeable number, because it can be changed into a prime (213210302441) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 39775362 + ... + 39780721.

It is an arithmetic number, because the mean of its divisors is an integer number (15215101065).

Almost surely, 2^213210302440 is an apocalyptic number.

213210302440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

213210302440 is an abundant number, since it is smaller than the sum of its proper divisors (273672931640).

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

213210302440 is a wasteful number, since it uses less digits than its factorization.

213210302440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79556161 (or 79556157 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 22.

Adding to 213210302440 its reverse (44203012312), we get a palindrome (257413314752).

The spelling of 213210302440 in words is "two hundred thirteen billion, two hundred ten million, three hundred two thousand, four hundred forty".