21533150241 has 28 divisors (see below), whose sum is σ = 32296838400. Its totient is φ = 14350151160.

The previous prime is 21533150239. The next prime is 21533150293. The reversal of 21533150241 is 14205133512.

21533150241 is a `hidden beast` number, since 2 + 153 + 3 + 1 + 502 + 4 + 1 = 666.

It is not a de Polignac number, because 21533150241 - 2¹ = 21533150239 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (21533150141) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 3933136 + ... + 3938606.

Almost surely, 2^21533150241 is an apocalyptic number.

It is an amenable number.

21533150241 is a deficient number, since it is larger than the sum of its proper divisors (10763688159).

21533150241 is an frugal number, since it uses more digits than its factorization.

21533150241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10888 (or 10873 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

Adding to 21533150241 its reverse (14205133512), we get a palindrome (35738283753).

The spelling of 21533150241 in words is "twenty-one billion, five hundred thirty-three million, one hundred fifty thousand, two hundred forty-one".