31420803131 has 2 divisors, whose sum is σ = 31420803132. Its totient is φ = 31420803130.

The previous prime is 31420803121. The next prime is 31420803157. The reversal of 31420803131 is 13130802413.

It is an a-pointer prime, because the next prime (31420803157) can be obtained adding 31420803131 to its sum of digits (26).

It is a weak prime.

It is an emirp because it is prime and its reverse (13130802413) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31420803131 - 2³⁴ = 14240933947 is a prime.

It is a super-2 number, since 2×31420803131² (a number of 22 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 31420803131.

It is not a weakly prime, because it can be changed into another prime (31420803121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15710401565 + 15710401566.

It is an arithmetic number, because the mean of its divisors is an integer number (15710401566).

Almost surely, 2^31420803131 is an apocalyptic number.

31420803131 is a deficient number, since it is larger than the sum of its proper divisors (1).

31420803131 is an equidigital number, since it uses as much as digits as its factorization.

31420803131 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 26.

The spelling of 31420803131 in words is "thirty-one billion, four hundred twenty million, eight hundred three thousand, one hundred thirty-one".