21043510151 has 8 divisors (see below), whose sum is σ = 21657369360. Its totient is φ = 20435308992.

The previous prime is 21043510139. The next prime is 21043510183. The reversal of 21043510151 is 15101534012.

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

It is not a de Polignac number, because 21043510151 - 2²⁶ = 20976401287 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21043510121) 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 7 ways as a sum of consecutive naturals, for example, 1406966 + ... + 1421843.

It is an arithmetic number, because the mean of its divisors is an integer number (2707171170).

Almost surely, 2^21043510151 is an apocalyptic number.

21043510151 is a deficient number, since it is larger than the sum of its proper divisors (613859209).

21043510151 is a wasteful number, since it uses less digits than its factorization.

21043510151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2829025.

The product of its (nonzero) digits is 600, while the sum is 23.

The spelling of 21043510151 in words is "twenty-one billion, forty-three million, five hundred ten thousand, one hundred fifty-one".