31144104421340 has 48 divisors (see below), whose sum is σ = 68246752670208. Its totient is φ = 11915910667584.

The previous prime is 31144104421321. The next prime is 31144104421349. The reversal of 31144104421340 is 4312440144113.

It is a junction number, because it is equal to n+sod(n) for n = 31144104421297 and 31144104421306.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31144104421349) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 92910479 + ... + 93245081.

It is an arithmetic number, because the mean of its divisors is an integer number (1421807347296).

Almost surely, 2^{31144104421340} is an apocalyptic number.

It is an amenable number.

31144104421340 is an abundant number, since it is smaller than the sum of its proper divisors (37102648248868).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31144104421340 is a wasteful number, since it uses less digits than its factorization.

31144104421340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 536978 (or 536976 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 32.

Adding to 31144104421340 its reverse (4312440144113), we get a palindrome (35456544565453).

The spelling of 31144104421340 in words is "thirty-one trillion, one hundred forty-four billion, one hundred four million, four hundred twenty-one thousand, three hundred forty".