31712001458281 has 3 divisors (see below), whose sum is σ = 31712007089623. Its totient is φ = 31711995826940.

The previous prime is 31712001458261. The next prime is 31712001458309. The reversal of 31712001458281 is 18285410021713.

It is a happy number.

The square root of 31712001458281 is 5631341.

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

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 6814496190681 + 24897505267600 = 2610459^2 + 4989740^2 .

It is not a de Polignac number, because 31712001458281 - 2³⁹ = 31162245644393 is a prime.

It is a super-2 number, since 2×31712001458281² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31712001458261) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 2815671 + ... + 8447011.

Almost surely, 2^{31712001458281} is an apocalyptic number.

31712001458281 is the 5631341-st square number.

31712001458281 is the 2815671-st centered octagonal number.

It is an amenable number.

31712001458281 is a deficient number, since it is larger than the sum of its proper divisors (5631342).

31712001458281 is an frugal number, since it uses more digits than its factorization.

31712001458281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11262682 (or 5631341 counting only the distinct ones).

The product of its (nonzero) digits is 107520, while the sum is 43.

Adding to 31712001458281 its reverse (18285410021713), we get a palindrome (49997411479994).

The spelling of 31712001458281 in words is "thirty-one trillion, seven hundred twelve billion, one million, four hundred fifty-eight thousand, two hundred eighty-one".