207343037146921 has 27 divisors (see below), whose sum is σ = 228846476897829. Its totient is φ = 187773388032672.

The previous prime is 207343037146913. The next prime is 207343037146937. The reversal of 207343037146921 is 129641730343702.

The square root of 207343037146921 is 14399411.

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

It can be written as a sum of positive squares in 4 ways, for example, as 5381421004521 + 201961616142400 = 2319789^2 + 14211320^2 .

It is not a de Polignac number, because 207343037146921 - 2³ = 207343037146913 is a prime.

It is a super-2 number, since 2×207343037146921² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (207343037446921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 9921183730 + ... + 9921204628.

Almost surely, 2^{207343037146921} is an apocalyptic number.

207343037146921 is the 14399411-st square number.

207343037146921 is the 7199706-th centered octagonal number.

It is an amenable number.

207343037146921 is a deficient number, since it is larger than the sum of its proper divisors (21503439750908).

207343037146921 is an frugal number, since it uses more digits than its factorization.

207343037146921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41930 (or 20965 counting only the distinct ones).

The product of its (nonzero) digits is 4572288, while the sum is 52.

The spelling of 207343037146921 in words is "two hundred seven trillion, three hundred forty-three billion, thirty-seven million, one hundred forty-six thousand, nine hundred twenty-one".