31425422551 has 2 divisors, whose sum is σ = 31425422552. Its totient is φ = 31425422550.

The previous prime is 31425422449. The next prime is 31425422563. The reversal of 31425422551 is 15522452413.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 31425422551 - 2²¹ = 31423325399 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31425492551) 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, 15712711275 + 15712711276.

It is an arithmetic number, because the mean of its divisors is an integer number (15712711276).

Almost surely, 2^31425422551 is an apocalyptic number.

31425422551 is a deficient number, since it is larger than the sum of its proper divisors (1).

31425422551 is an equidigital number, since it uses as much as digits as its factorization.

31425422551 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 48000, while the sum is 34.

Adding to 31425422551 its reverse (15522452413), we get a palindrome (46947874964).

The spelling of 31425422551 in words is "thirty-one billion, four hundred twenty-five million, four hundred twenty-two thousand, five hundred fifty-one".