213278275740 has 96 divisors (see below), whose sum is σ = 604883220480. Its totient is φ = 56141645056.

The previous prime is 213278275709. The next prime is 213278275741. The reversal of 213278275740 is 47572872312.

It is a self number, because there is not a number n which added to its sum of digits gives 213278275740.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213278275741) 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, 6102997 + ... + 6137843.

It is an arithmetic number, because the mean of its divisors is an integer number (6300866880).

Almost surely, 2^213278275740 is an apocalyptic number.

213278275740 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 213278275740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (302441610240).

213278275740 is an abundant number, since it is smaller than the sum of its proper divisors (391604944740).

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

213278275740 is a wasteful number, since it uses less digits than its factorization.

213278275740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36171 (or 36169 counting only the distinct ones).

The product of its (nonzero) digits is 1317120, while the sum is 48.

The spelling of 213278275740 in words is "two hundred thirteen billion, two hundred seventy-eight million, two hundred seventy-five thousand, seven hundred forty".