31433444214321 has 16 divisors (see below), whose sum is σ = 44093849240448. Its totient is φ = 19891962057600.

The previous prime is 31433444214283. The next prime is 31433444214349. The reversal of 31433444214321 is 12341244433413.

It is a de Polignac number, because none of the positive numbers 2^k-31433444214321 is a prime.

It is a super-2 number, since 2×31433444214321² (a number of 28 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 31433444214321.

It is not an unprimeable number, because it can be changed into a prime (31433444214371) 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, 3453461085 + ... + 3453470186.

It is an arithmetic number, because the mean of its divisors is an integer number (2755865577528).

Almost surely, 2^{31433444214321} is an apocalyptic number.

It is an amenable number.

31433444214321 is a deficient number, since it is larger than the sum of its proper divisors (12660405026127).

31433444214321 is a wasteful number, since it uses less digits than its factorization.

31433444214321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6906931352.

The product of its digits is 331776, while the sum is 39.

Adding to 31433444214321 its reverse (12341244433413), we get a palindrome (43774688647734).

The spelling of 31433444214321 in words is "thirty-one trillion, four hundred thirty-three billion, four hundred forty-four million, two hundred fourteen thousand, three hundred twenty-one".