21541619151 has 192 divisors, whose sum is σ = 38641075200. Its totient is φ = 11430346752.

The previous prime is 21541619123. The next prime is 21541619153. The reversal of 21541619151 is 15191614512.

It is a happy number.

21541619151 is a `hidden beast` number, since 2 + 1 + 5 + 416 + 191 + 51 = 666.

It is not a de Polignac number, because 21541619151 - 2⁹ = 21541618639 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21541619153) 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 191 ways as a sum of consecutive naturals, for example, 111614511 + ... + 111614703.

It is an arithmetic number, because the mean of its divisors is an integer number (201255600).

Almost surely, 2^21541619151 is an apocalyptic number.

21541619151 is a deficient number, since it is larger than the sum of its proper divisors (17099456049).

21541619151 is a wasteful number, since it uses less digits than its factorization.

21541619151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 350 (or 347 counting only the distinct ones).

The product of its digits is 10800, while the sum is 36.

The spelling of 21541619151 in words is "twenty-one billion, five hundred forty-one million, six hundred nineteen thousand, one hundred fifty-one".