21150301651 has 8 divisors (see below), whose sum is σ = 21528561600. Its totient is φ = 20772701160.

The previous prime is 21150301639. The next prime is 21150301699. The reversal of 21150301651 is 15610305112.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 21150301651 - 2⁵ = 21150301619 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21150301631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 99921 + ... + 228658.

It is an arithmetic number, because the mean of its divisors is an integer number (2691070200).

Almost surely, 2^21150301651 is an apocalyptic number.

21150301651 is a deficient number, since it is larger than the sum of its proper divisors (378259949).

21150301651 is a wasteful number, since it uses less digits than its factorization.

21150301651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 329729.

The product of its (nonzero) digits is 900, while the sum is 25.

Adding to 21150301651 its reverse (15610305112), we get a palindrome (36760606763).

The spelling of 21150301651 in words is "twenty-one billion, one hundred fifty million, three hundred one thousand, six hundred fifty-one".