31225440443 has 2 divisors, whose sum is σ = 31225440444. Its totient is φ = 31225440442.

The previous prime is 31225440413. The next prime is 31225440461. The reversal of 31225440443 is 34404452213.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 31225440443 - 2¹⁶ = 31225374907 is a prime.

It is not a weakly prime, because it can be changed into another prime (31225440413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15612720221 + 15612720222.

It is an arithmetic number, because the mean of its divisors is an integer number (15612720222).

Almost surely, 2^31225440443 is an apocalyptic number.

31225440443 is a deficient number, since it is larger than the sum of its proper divisors (1).

31225440443 is an equidigital number, since it uses as much as digits as its factorization.

31225440443 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 46080, while the sum is 32.

Adding to 31225440443 its reverse (34404452213), we get a palindrome (65629892656).

The spelling of 31225440443 in words is "thirty-one billion, two hundred twenty-five million, four hundred forty thousand, four hundred forty-three".