1431312721774 has 12 divisors (see below), whose sum is σ = 2324824510176. Its totient is φ = 660605871432.

The previous prime is 1431312721759. The next prime is 1431312721777. The reversal of 1431312721774 is 4771272131341.

It is a super-2 number, since 2×1431312721774² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1431312721774.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1431312721777) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2117326174 + ... + 2117326849.

It is an arithmetic number, because the mean of its divisors is an integer number (193735375848).

Almost surely, 2^{1431312721774} is an apocalyptic number.

1431312721774 is a deficient number, since it is larger than the sum of its proper divisors (893511788402).

1431312721774 is a wasteful number, since it uses less digits than its factorization.

1431312721774 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4234653051 (or 4234653038 counting only the distinct ones).

The product of its digits is 197568, while the sum is 43.

The spelling of 1431312721774 in words is "one trillion, four hundred thirty-one billion, three hundred twelve million, seven hundred twenty-one thousand, seven hundred seventy-four".