31316225436403 has 2 divisors, whose sum is σ = 31316225436404. Its totient is φ = 31316225436402.

The previous prime is 31316225436371. The next prime is 31316225436479. The reversal of 31316225436403 is 30463452261313.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31316225436403 - 2⁵ = 31316225436371 is a prime.

It is a super-2 number, since 2×31316225436403² (a number of 28 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 31316225436403.

It is not a weakly prime, because it can be changed into another prime (31316225433403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15658112718201 + 15658112718202.

It is an arithmetic number, because the mean of its divisors is an integer number (15658112718202).

Almost surely, 2^{31316225436403} is an apocalyptic number.

31316225436403 is a deficient number, since it is larger than the sum of its proper divisors (1).

31316225436403 is an equidigital number, since it uses as much as digits as its factorization.

31316225436403 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 933120, while the sum is 43.

Adding to 31316225436403 its reverse (30463452261313), we get a palindrome (61779677697716).

The spelling of 31316225436403 in words is "thirty-one trillion, three hundred sixteen billion, two hundred twenty-five million, four hundred thirty-six thousand, four hundred three".