212340065603449 has 27 divisors (see below), whose sum is σ = 248291539861743. Its totient is φ = 181064746811088.

The previous prime is 212340065603399. The next prime is 212340065603459. The reversal of 212340065603449 is 944306560043212.

The square root of 212340065603449 is 14571893.

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., 208050477842025 + 4289587761424 = 14423955^2 + 2071132^2 .

It is not a de Polignac number, because 212340065603449 - 2¹³ = 212340065595257 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is not an unprimeable number, because it can be changed into a prime (212340065603459) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 20094635164 + ... + 20094645730.

Almost surely, 2^{212340065603449} is an apocalyptic number.

212340065603449 is the 14571893-rd square number.

212340065603449 is the 7285947-th centered octagonal number.

It is an amenable number.

212340065603449 is a deficient number, since it is larger than the sum of its proper divisors (35951474258294).

212340065603449 is an frugal number, since it uses more digits than its factorization.

212340065603449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21542 (or 10771 counting only the distinct ones).

The product of its (nonzero) digits is 3732480, while the sum is 49.

212340065603449 divided by its sum of digits (49) gives a square (4333470726601 = 2081699²).

The spelling of 212340065603449 in words is "two hundred twelve trillion, three hundred forty billion, sixty-five million, six hundred three thousand, four hundred forty-nine".