213551288243 has 12 divisors (see below), whose sum is σ = 220645186032. Its totient is φ = 206534444400.

The previous prime is 213551288231. The next prime is 213551288273. The reversal of 213551288243 is 342882155312.

It is a happy number.

It is not a de Polignac number, because 213551288243 - 2²⁴ = 213534511027 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 213551288194 and 213551288203.

It is not an unprimeable number, because it can be changed into a prime (213551288273) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 928418 + ... + 1135368.

It is an arithmetic number, because the mean of its divisors is an integer number (18387098836).

Almost surely, 2^213551288243 is an apocalyptic number.

213551288243 is a deficient number, since it is larger than the sum of its proper divisors (7093897789).

213551288243 is an equidigital number, since it uses as much as digits as its factorization.

213551288243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 207322 (or 207155 counting only the distinct ones).

The product of its digits is 460800, while the sum is 44.

The spelling of 213551288243 in words is "two hundred thirteen billion, five hundred fifty-one million, two hundred eighty-eight thousand, two hundred forty-three".