21531355055214 has 32 divisors (see below), whose sum is σ = 43099019758080. Its totient is φ = 7171069118400.

The previous prime is 21531355055209. The next prime is 21531355055219. The reversal of 21531355055214 is 41255055313512.

It is an interprime number because it is at equal distance from previous prime (21531355055209) and next prime (21531355055219).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21531355055219) 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, 36291274 + ... + 36879794.

It is an arithmetic number, because the mean of its divisors is an integer number (1346844367440).

Almost surely, 2^{21531355055214} is an apocalyptic number.

21531355055214 is an abundant number, since it is smaller than the sum of its proper divisors (21567664702866).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21531355055214 is a wasteful number, since it uses less digits than its factorization.

21531355055214 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 593656.

The product of its (nonzero) digits is 450000, while the sum is 42.

The spelling of 21531355055214 in words is "twenty-one trillion, five hundred thirty-one billion, three hundred fifty-five million, fifty-five thousand, two hundred fourteen".