21551503214 has 8 divisors (see below), whose sum is σ = 32415341088. Its totient is φ = 10746389520.

The previous prime is 21551503213. The next prime is 21551503219. The reversal of 21551503214 is 41230515512.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21551503213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14680127 + ... + 14681594.

It is an arithmetic number, because the mean of its divisors is an integer number (4051917636).

Almost surely, 2^21551503214 is an apocalyptic number.

21551503214 is a deficient number, since it is larger than the sum of its proper divisors (10863837874).

21551503214 is a wasteful number, since it uses less digits than its factorization.

21551503214 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29362090.

The product of its (nonzero) digits is 6000, while the sum is 29.

The spelling of 21551503214 in words is "twenty-one billion, five hundred fifty-one million, five hundred three thousand, two hundred fourteen".