2101131653 has 2 divisors, whose sum is σ = 2101131654. Its totient is φ = 2101131652.

The previous prime is 2101131623. The next prime is 2101131679. The reversal of 2101131653 is 3561311012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2101122244 + 9409 = 45838^2 + 97^2 .

It is a cyclic number.

It is not a de Polignac number, because 2101131653 - 2⁶ = 2101131589 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2101131623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1050565826 + 1050565827.

It is an arithmetic number, because the mean of its divisors is an integer number (1050565827).

Almost surely, 2^2101131653 is an apocalyptic number.

It is an amenable number.

2101131653 is a deficient number, since it is larger than the sum of its proper divisors (1).

2101131653 is an equidigital number, since it uses as much as digits as its factorization.

2101131653 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 540, while the sum is 23.

The square root of 2101131653 is about 45838.1026330715. The cubic root of 2101131653 is about 1280.8091508638.

Adding to 2101131653 its reverse (3561311012), we get a palindrome (5662442665).

The spelling of 2101131653 in words is "two billion, one hundred one million, one hundred thirty-one thousand, six hundred fifty-three".