21523135014535 has 32 divisors (see below), whose sum is σ = 32201136451584. Its totient is φ = 13416898272000.

The previous prime is 21523135014533. The next prime is 21523135014541. The reversal of 21523135014535 is 53541053132512.

It is not a de Polignac number, because 21523135014535 - 2¹ = 21523135014533 is a prime.

It is a super-2 number, since 2×21523135014535² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21523135014533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 63290355 + ... + 63629515.

It is an arithmetic number, because the mean of its divisors is an integer number (1006285514112).

Almost surely, 2^{21523135014535} is an apocalyptic number.

21523135014535 is a deficient number, since it is larger than the sum of its proper divisors (10678001437049).

21523135014535 is a wasteful number, since it uses less digits than its factorization.

21523135014535 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 504015.

The product of its (nonzero) digits is 270000, while the sum is 40.

The spelling of 21523135014535 in words is "twenty-one trillion, five hundred twenty-three billion, one hundred thirty-five million, fourteen thousand, five hundred thirty-five".