31505316053 has 2 divisors, whose sum is σ = 31505316054. Its totient is φ = 31505316052.

The previous prime is 31505316041. The next prime is 31505316083. The reversal of 31505316053 is 35061350513.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 31505185009 + 131044 = 177497^2 + 362^2 .

It is a cyclic number.

It is not a de Polignac number, because 31505316053 - 2¹⁴ = 31505299669 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31505316083) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15752658026 + 15752658027.

It is an arithmetic number, because the mean of its divisors is an integer number (15752658027).

Almost surely, 2^31505316053 is an apocalyptic number.

It is an amenable number.

31505316053 is a deficient number, since it is larger than the sum of its proper divisors (1).

31505316053 is an equidigital number, since it uses as much as digits as its factorization.

31505316053 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20250, while the sum is 32.

Adding to 31505316053 its reverse (35061350513), we get a palindrome (66566666566).

The spelling of 31505316053 in words is "thirty-one billion, five hundred five million, three hundred sixteen thousand, fifty-three".