213406364442252 has 12 divisors (see below), whose sum is σ = 497948183698616. Its totient is φ = 71135454814080.

The previous prime is 213406364442241. The next prime is 213406364442301. The reversal of 213406364442252 is 252244463604312.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-3 number, since 3×213406364442252³ (a number of 44 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8891931851749 + ... + 8891931851772.

Almost surely, 2^{213406364442252} is an apocalyptic number.

It is an amenable number.

213406364442252 is an abundant number, since it is smaller than the sum of its proper divisors (284541819256364).

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

213406364442252 is a wasteful number, since it uses less digits than its factorization.

213406364442252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17783863703528 (or 17783863703526 counting only the distinct ones).

The product of its (nonzero) digits is 6635520, while the sum is 48.

The spelling of 213406364442252 in words is "two hundred thirteen trillion, four hundred six billion, three hundred sixty-four million, four hundred forty-two thousand, two hundred fifty-two".