221054526531 has 48 divisors (see below), whose sum is σ = 349162164000. Its totient is φ = 134197668864.

The previous prime is 221054526529. The next prime is 221054526541. The reversal of 221054526531 is 135625450122.

221054526531 is a `hidden beast` number, since 2 + 21 + 0 + 54 + 52 + 6 + 531 = 666.

221054526531 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 221054526531 - 2¹ = 221054526529 is a prime.

It is a super-2 number, since 2×221054526531² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (221054526541) 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 47 ways as a sum of consecutive naturals, for example, 904245 + ... + 1122393.

It is an arithmetic number, because the mean of its divisors is an integer number (7274211750).

Almost surely, 2^221054526531 is an apocalyptic number.

221054526531 is a deficient number, since it is larger than the sum of its proper divisors (128107637469).

221054526531 is a wasteful number, since it uses less digits than its factorization.

221054526531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 218388 (or 218385 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 36.

Adding to 221054526531 its reverse (135625450122), we get a palindrome (356679976653).

The spelling of 221054526531 in words is "two hundred twenty-one billion, fifty-four million, five hundred twenty-six thousand, five hundred thirty-one".