21522501155426 has 16 divisors (see below), whose sum is σ = 32401560309696. Its totient is φ = 10722042174096.

The previous prime is 21522501155399. The next prime is 21522501155437. The reversal of 21522501155426 is 62455110522512.

It is a Curzon number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 14575556 + ... + 15984111.

It is an arithmetic number, because the mean of its divisors is an integer number (2025097519356).

Almost surely, 2^{21522501155426} is an apocalyptic number.

21522501155426 is a deficient number, since it is larger than the sum of its proper divisors (10879059154270).

21522501155426 is a wasteful number, since it uses less digits than its factorization.

21522501155426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30560953.

The product of its (nonzero) digits is 240000, while the sum is 41.

Adding to 21522501155426 its reverse (62455110522512), we get a palindrome (83977611677938).

The spelling of 21522501155426 in words is "twenty-one trillion, five hundred twenty-two billion, five hundred one million, one hundred fifty-five thousand, four hundred twenty-six".