31144220341 has 4 divisors (see below), whose sum is σ = 33539929612. Its totient is φ = 28748511072.

The previous prime is 31144220267. The next prime is 31144220381. The reversal of 31144220341 is 14302244113.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 14302244113 = 1013 ⋅14118701.

It can be written as a sum of positive squares in 2 ways, for example, as 13373997316 + 17770223025 = 115646^2 + 133305^2 .

It is a cyclic number.

It is not a de Polignac number, because 31144220341 - 2¹³ = 31144212149 is a prime.

It is a super-4 number, since 4×31144220341⁴ (a number of 43 digits) contains 4444 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31144220381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1197854616 + ... + 1197854641.

It is an arithmetic number, because the mean of its divisors is an integer number (8384982403).

Almost surely, 2^31144220341 is an apocalyptic number.

It is an amenable number.

31144220341 is a deficient number, since it is larger than the sum of its proper divisors (2395709271).

31144220341 is a wasteful number, since it uses less digits than its factorization.

31144220341 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2395709270.

The product of its (nonzero) digits is 2304, while the sum is 25.

Adding to 31144220341 its reverse (14302244113), we get a palindrome (45446464454).

The spelling of 31144220341 in words is "thirty-one billion, one hundred forty-four million, two hundred twenty thousand, three hundred forty-one".