212237915781407 has 4 divisors (see below), whose sum is σ = 213164718907320. Its totient is φ = 211311112655496.

The previous prime is 212237915781377. The next prime is 212237915781413. The reversal of 212237915781407 is 704187519732212.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 212237915781407 - 2¹⁶ = 212237915715871 is a prime.

It is a super-2 number, since 2×212237915781407² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212237915781467) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 463401562613 + ... + 463401563070.

It is an arithmetic number, because the mean of its divisors is an integer number (53291179726830).

Almost surely, 2^{212237915781407} is an apocalyptic number.

212237915781407 is a deficient number, since it is larger than the sum of its proper divisors (926803125913).

212237915781407 is an equidigital number, since it uses as much as digits as its factorization.

212237915781407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 926803125912.

The product of its (nonzero) digits is 11854080, while the sum is 59.

The spelling of 212237915781407 in words is "two hundred twelve trillion, two hundred thirty-seven billion, nine hundred fifteen million, seven hundred eighty-one thousand, four hundred seven".