31851681053 has 2 divisors, whose sum is σ = 31851681054. Its totient is φ = 31851681052.

The previous prime is 31851681007. The next prime is 31851681061. The reversal of 31851681053 is 35018615813.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 29612214724 + 2239466329 = 172082^2 + 47323^2 .

It is a cyclic number.

It is not a de Polignac number, because 31851681053 - 2¹² = 31851676957 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31851681053.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31851681553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15925840526 + 15925840527.

It is an arithmetic number, because the mean of its divisors is an integer number (15925840527).

Almost surely, 2^31851681053 is an apocalyptic number.

It is an amenable number.

31851681053 is a deficient number, since it is larger than the sum of its proper divisors (1).

31851681053 is an equidigital number, since it uses as much as digits as its factorization.

31851681053 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 86400, while the sum is 41.

The spelling of 31851681053 in words is "thirty-one billion, eight hundred fifty-one million, six hundred eighty-one thousand, fifty-three".