2105151521355 has 56 divisors (see below), whose sum is σ = 3824313019488. Its totient is φ = 1111846818816.

The previous prime is 2105151521351. The next prime is 2105151521393. The reversal of 2105151521355 is 5531251515012.

2105151521355 is a `hidden beast` number, since 2 + 1 + 0 + 5 + 1 + 515 + 2 + 135 + 5 = 666.

It is not a de Polignac number, because 2105151521355 - 2² = 2105151521351 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2105151521351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 2428182 + ... + 3179051.

Almost surely, 2^{2105151521355} is an apocalyptic number.

2105151521355 is a deficient number, since it is larger than the sum of its proper divisors (1719161498133).

2105151521355 is an equidigital number, since it uses as much as digits as its factorization.

2105151521355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5607359 (or 5607344 counting only the distinct ones).

The product of its (nonzero) digits is 37500, while the sum is 36.

The spelling of 2105151521355 in words is "two trillion, one hundred five billion, one hundred fifty-one million, five hundred twenty-one thousand, three hundred fifty-five".