21532300151 has 4 divisors (see below), whose sum is σ = 21536235600. Its totient is φ = 21528364704.

The previous prime is 21532300121. The next prime is 21532300157. The reversal of 21532300151 is 15100323512.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21532300151 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 (21532300157) 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 3 ways as a sum of consecutive naturals, for example, 1959506 + ... + 1970463.

It is an arithmetic number, because the mean of its divisors is an integer number (5384058900).

Almost surely, 2^21532300151 is an apocalyptic number.

21532300151 is a deficient number, since it is larger than the sum of its proper divisors (3935449).

21532300151 is an equidigital number, since it uses as much as digits as its factorization.

21532300151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3935448.

The product of its (nonzero) digits is 900, while the sum is 23.

Adding to 21532300151 its reverse (15100323512), we get a palindrome (36632623663).

The spelling of 21532300151 in words is "twenty-one billion, five hundred thirty-two million, three hundred thousand, one hundred fifty-one".