1431758226721 has 9 divisors (see below), whose sum is σ = 1465881950001. Its totient is φ = 1398411268212.

The previous prime is 1431758226713. The next prime is 1431758226809. The reversal of 1431758226721 is 1276228571341.

It is a happy number.

The square root of 1431758226721 is 1196561.

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

It is not a de Polignac number, because 1431758226721 - 2³ = 1431758226713 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1431758221721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 51438210 + ... + 51466036.

Almost surely, 2^{1431758226721} is an apocalyptic number.

1431758226721 is the 1196561-st square number.

1431758226721 is the 598281-st centered octagonal number.

It is an amenable number.

1431758226721 is a deficient number, since it is larger than the sum of its proper divisors (34123723280).

1431758226721 is an frugal number, since it uses more digits than its factorization.

1431758226721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55740 (or 27870 counting only the distinct ones).

The product of its digits is 1128960, while the sum is 49.

Multiplying 1431758226721 by its sum of digits (49), we get a square (70156153109329 = 8375927²).

The spelling of 1431758226721 in words is "one trillion, four hundred thirty-one billion, seven hundred fifty-eight million, two hundred twenty-six thousand, seven hundred twenty-one".