31134513988561 has 3 divisors (see below), whose sum is σ = 31134519568393. Its totient is φ = 31134508408730.

The previous prime is 31134513988547. The next prime is 31134513988583. The reversal of 31134513988561 is 16588931543113.

The square root of 31134513988561 is 5579831.

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 is not a de Polignac number, because 31134513988561 - 2¹³ = 31134513980369 is a prime.

It is a super-2 number, since 2×31134513988561² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31134513988496 and 31134513988505.

It is not an unprimeable number, because it can be changed into a prime (31134583988561) 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 2 ways as a sum of consecutive naturals, for example, 2789916 + ... + 8369746.

Almost surely, 2^{31134513988561} is an apocalyptic number.

31134513988561 is the 5579831-st square number.

31134513988561 is the 2789916-th centered octagonal number.

It is an amenable number.

31134513988561 is a deficient number, since it is larger than the sum of its proper divisors (5579832).

31134513988561 is an frugal number, since it uses more digits than its factorization.

31134513988561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11159662 (or 5579831 counting only the distinct ones).

The product of its digits is 9331200, while the sum is 58.

The spelling of 31134513988561 in words is "thirty-one trillion, one hundred thirty-four billion, five hundred thirteen million, nine hundred eighty-eight thousand, five hundred sixty-one".