31420503551 has 2 divisors, whose sum is σ = 31420503552. Its totient is φ = 31420503550.

The previous prime is 31420503533. The next prime is 31420503553. The reversal of 31420503551 is 15530502413.

It is a strong prime.

It is an emirp because it is prime and its reverse (15530502413) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31420503551 is a prime.

Together with 31420503553, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31420503553) 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, 15710251775 + 15710251776.

It is an arithmetic number, because the mean of its divisors is an integer number (15710251776).

Almost surely, 2^31420503551 is an apocalyptic number.

31420503551 is a deficient number, since it is larger than the sum of its proper divisors (1).

31420503551 is an equidigital number, since it uses as much as digits as its factorization.

31420503551 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9000, while the sum is 29.

The spelling of 31420503551 in words is "thirty-one billion, four hundred twenty million, five hundred three thousand, five hundred fifty-one".