1605461223131 has 2 divisors, whose sum is σ = 1605461223132. Its totient is φ = 1605461223130.

The previous prime is 1605461223127. The next prime is 1605461223139. The reversal of 1605461223131 is 1313221645061.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1605461223131 - 2² = 1605461223127 is a prime.

It is a super-2 number, since 2×1605461223131² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1605461223091 and 1605461223100.

It is not a weakly prime, because it can be changed into another prime (1605461223139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 802730611565 + 802730611566.

It is an arithmetic number, because the mean of its divisors is an integer number (802730611566).

Almost surely, 2^{1605461223131} is an apocalyptic number.

1605461223131 is a deficient number, since it is larger than the sum of its proper divisors (1).

1605461223131 is an equidigital number, since it uses as much as digits as its factorization.

1605461223131 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25920, while the sum is 35.

Adding to 1605461223131 its reverse (1313221645061), we get a palindrome (2918682868192).

The spelling of 1605461223131 in words is "one trillion, six hundred five billion, four hundred sixty-one million, two hundred twenty-three thousand, one hundred thirty-one".