21514555554351 has 8 divisors (see below), whose sum is σ = 28686152244480. Its totient is φ = 14342997950232.

The previous prime is 21514555554341. The next prime is 21514555554367. The reversal of 21514555554351 is 15345555541512.

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

It is not a de Polignac number, because 21514555554351 - 2¹⁰ = 21514555553327 is a prime.

It is a super-2 number, since 2×21514555554351² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21514555554294 and 21514555554303.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21514555554341) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8462071 + ... + 10706808.

It is an arithmetic number, because the mean of its divisors is an integer number (3585769030560).

Almost surely, 2^{21514555554351} is an apocalyptic number.

21514555554351 is a deficient number, since it is larger than the sum of its proper divisors (7171596690129).

21514555554351 is a wasteful number, since it uses less digits than its factorization.

21514555554351 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19543005.

The product of its digits is 7500000, while the sum is 51.

The spelling of 21514555554351 in words is "twenty-one trillion, five hundred fourteen billion, five hundred fifty-five million, five hundred fifty-four thousand, three hundred fifty-one".