213042302440 has 128 divisors (see below), whose sum is σ = 550676361600. Its totient is φ = 73361617920.

The previous prime is 213042302437. The next prime is 213042302443. The reversal of 213042302440 is 44203240312.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (213042302437) and next prime (213042302443).

It is not an unprimeable number, because it can be changed into a prime (213042302443) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 29532274 + ... + 29539486.

It is an arithmetic number, because the mean of its divisors is an integer number (4302159075).

Almost surely, 2^213042302440 is an apocalyptic number.

213042302440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 213042302440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (275338180800).

213042302440 is an abundant number, since it is smaller than the sum of its proper divisors (337634059160).

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

213042302440 is a wasteful number, since it uses less digits than its factorization.

213042302440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10787 (or 10783 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 25.

Adding to 213042302440 its reverse (44203240312), we get a palindrome (257245542752).

The spelling of 213042302440 in words is "two hundred thirteen billion, forty-two million, three hundred two thousand, four hundred forty".