221534407470477 has 16 divisors (see below), whose sum is σ = 303413615885952. Its totient is φ = 143673748966080.

The previous prime is 221534407470457. The next prime is 221534407470487. The reversal of 221534407470477 is 774074704435122.

It is not a de Polignac number, because 221534407470477 - 2⁷ = 221534407470349 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221534407470427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 167707674 + ... + 169023467.

It is an arithmetic number, because the mean of its divisors is an integer number (18963350992872).

Almost surely, 2^{221534407470477} is an apocalyptic number.

It is an amenable number.

221534407470477 is a deficient number, since it is larger than the sum of its proper divisors (81879208415475).

221534407470477 is a wasteful number, since it uses less digits than its factorization.

221534407470477 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 336737108.

The product of its (nonzero) digits is 36879360, while the sum is 57.

The spelling of 221534407470477 in words is "two hundred twenty-one trillion, five hundred thirty-four billion, four hundred seven million, four hundred seventy thousand, four hundred seventy-seven".