21525142150065 has 16 divisors (see below), whose sum is σ = 35937628633728. Its totient is φ = 10980942082176.

The previous prime is 21525142149943. The next prime is 21525142150093. The reversal of 21525142150065 is 56005124152512.

It is a happy number.

It is not a de Polignac number, because 21525142150065 - 2¹⁶ = 21525142084529 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31195857844 + ... + 31195858533.

It is an arithmetic number, because the mean of its divisors is an integer number (2246101789608).

Almost surely, 2^{21525142150065} is an apocalyptic number.

It is an amenable number.

21525142150065 is a deficient number, since it is larger than the sum of its proper divisors (14412486483663).

21525142150065 is a wasteful number, since it uses less digits than its factorization.

21525142150065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62391716408.

The product of its (nonzero) digits is 120000, while the sum is 39.

The spelling of 21525142150065 in words is "twenty-one trillion, five hundred twenty-five billion, one hundred forty-two million, one hundred fifty thousand, sixty-five".