213541955236 has 9 divisors (see below), whose sum is σ = 373700039041. Its totient is φ = 106770515512.

The previous prime is 213541955197. The next prime is 213541955261. The reversal of 213541955236 is 632559145312.

It is a happy number.

The square root of 213541955236 is 462106.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 35167500900 + 178374454336 = 187530^2 + 422344^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 808686 + ... + 1039738.

Almost surely, 2^213541955236 is an apocalyptic number.

213541955236 is the 462106-th square number.

It is an amenable number.

213541955236 is a deficient number, since it is larger than the sum of its proper divisors (160158083805).

213541955236 is an frugal number, since it uses more digits than its factorization.

213541955236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 462110 (or 231055 counting only the distinct ones).

The product of its digits is 972000, while the sum is 46.

The spelling of 213541955236 in words is "two hundred thirteen billion, five hundred forty-one million, nine hundred fifty-five thousand, two hundred thirty-six".