213402310221056 has 144 divisors (see below), whose sum is σ = 465406351058880. Its totient is φ = 96852796784640.

The previous prime is 213402310221047. The next prime is 213402310221083. The reversal of 213402310221056 is 650122013204312.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a congruent number.

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, 6092491415 + ... + 6092526441.

It is an arithmetic number, because the mean of its divisors is an integer number (3231988549020).

Almost surely, 2^{213402310221056} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 213402310221056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (232703175529440).

213402310221056 is an abundant number, since it is smaller than the sum of its proper divisors (252004040837824).

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

213402310221056 is a wasteful number, since it uses less digits than its factorization.

213402310221056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38300 (or 38286 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 32.

Adding to 213402310221056 its reverse (650122013204312), we get a palindrome (863524323425368).

The spelling of 213402310221056 in words is "two hundred thirteen trillion, four hundred two billion, three hundred ten million, two hundred twenty-one thousand, fifty-six".