31134451655 has 4 divisors (see below), whose sum is σ = 37361341992. Its totient is φ = 24907561320.

The previous prime is 31134451651. The next prime is 31134451693. The reversal of 31134451655 is 55615443113.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 55615443113 = 229 ⋅242862197.

It is not a de Polignac number, because 31134451655 - 2² = 31134451651 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31134451651) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3113445161 + ... + 3113445170.

It is an arithmetic number, because the mean of its divisors is an integer number (9340335498).

Almost surely, 2^31134451655 is an apocalyptic number.

31134451655 is a deficient number, since it is larger than the sum of its proper divisors (6226890337).

31134451655 is an equidigital number, since it uses as much as digits as its factorization.

31134451655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6226890336.

The product of its digits is 108000, while the sum is 38.

Adding to 31134451655 its reverse (55615443113), we get a palindrome (86749894768).

The spelling of 31134451655 in words is "thirty-one billion, one hundred thirty-four million, four hundred fifty-one thousand, six hundred fifty-five".