21525110151 has 16 divisors (see below), whose sum is σ = 29493674496. Its totient is φ = 13956175296.

The previous prime is 21525110147. The next prime is 21525110153. The reversal of 21525110151 is 15101152512.

It is not a de Polignac number, because 21525110151 - 2² = 21525110147 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21525110153) 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 15 ways as a sum of consecutive naturals, for example, 328015 + ... + 388128.

It is an arithmetic number, because the mean of its divisors is an integer number (1843354656).

Almost surely, 2^21525110151 is an apocalyptic number.

21525110151 is a deficient number, since it is larger than the sum of its proper divisors (7968564345).

21525110151 is a wasteful number, since it uses less digits than its factorization.

21525110151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 716422.

The product of its (nonzero) digits is 500, while the sum is 24.

Adding to 21525110151 its reverse (15101152512), we get a palindrome (36626262663).

The spelling of 21525110151 in words is "twenty-one billion, five hundred twenty-five million, one hundred ten thousand, one hundred fifty-one".