31441233123551 has 2 divisors, whose sum is σ = 31441233123552. Its totient is φ = 31441233123550.

The previous prime is 31441233123533. The next prime is 31441233123691. The reversal of 31441233123551 is 15532133214413.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31441233123551 is a prime.

It is a super-2 number, since 2×31441233123551² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31441233173551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15720616561775 + 15720616561776.

It is an arithmetic number, because the mean of its divisors is an integer number (15720616561776).

Almost surely, 2^{31441233123551} is an apocalyptic number.

31441233123551 is a deficient number, since it is larger than the sum of its proper divisors (1).

31441233123551 is an equidigital number, since it uses as much as digits as its factorization.

31441233123551 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 129600, while the sum is 38.

Adding to 31441233123551 its reverse (15532133214413), we get a palindrome (46973366337964).

The spelling of 31441233123551 in words is "thirty-one trillion, four hundred forty-one billion, two hundred thirty-three million, one hundred twenty-three thousand, five hundred fifty-one".