212237915781409 has 8 divisors (see below), whose sum is σ = 242908642090688. Its totient is φ = 181654945485840.

The previous prime is 212237915781377. The next prime is 212237915781413. The reversal of 212237915781409 is 904187519732212.

212237915781409 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 212237915781409 - 2⁵ = 212237915781377 is a prime.

It is not an unprimeable number, because it can be changed into a prime (212237915781439) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21938998242 + ... + 21939007915.

It is an arithmetic number, because the mean of its divisors is an integer number (30363580261336).

Almost surely, 2^{212237915781409} is an apocalyptic number.

It is an amenable number.

212237915781409 is a deficient number, since it is larger than the sum of its proper divisors (30670726309279).

212237915781409 is an equidigital number, since it uses as much as digits as its factorization.

212237915781409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43878006855.

The product of its (nonzero) digits is 15240960, while the sum is 61.

The spelling of 212237915781409 in words is "two hundred twelve trillion, two hundred thirty-seven billion, nine hundred fifteen million, seven hundred eighty-one thousand, four hundred nine".