1681530513131 has 16 divisors (see below), whose sum is σ = 1922733496320. Its totient is φ = 1440573850080.

The previous prime is 1681530513121. The next prime is 1681530513133. The reversal of 1681530513131 is 1313150351861.

It is a cyclic number.

It is not a de Polignac number, because 1681530513131 - 2¹⁰ = 1681530512107 is a prime.

It is a super-2 number, since 2×1681530513131² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1681530513133) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 207310766 + ... + 207318876.

It is an arithmetic number, because the mean of its divisors is an integer number (120170843520).

Almost surely, 2^{1681530513131} is an apocalyptic number.

1681530513131 is a deficient number, since it is larger than the sum of its proper divisors (241202983189).

1681530513131 is an equidigital number, since it uses as much as digits as its factorization.

1681530513131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19634.

The product of its (nonzero) digits is 32400, while the sum is 38.

Adding to 1681530513131 its reverse (1313150351861), we get a palindrome (2994680864992).

The spelling of 1681530513131 in words is "one trillion, six hundred eighty-one billion, five hundred thirty million, five hundred thirteen thousand, one hundred thirty-one".