105478280221 has 6 divisors (see below), whose sum is σ = 108113670266. Its totient is φ = 102905637600.

The previous prime is 105478280197. The next prime is 105478280339. The reversal of 105478280221 is 122082874501.

It can be written as a sum of positive squares in 3 ways, for example, as 8374995225 + 97103284996 = 91515^2 + 311614^2 .

It is not a de Polignac number, because 105478280221 - 2²⁷ = 105344062493 is a prime.

It is a super-2 number, since 2×105478280221² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (105478280021) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 31371990 + ... + 31375351.

Almost surely, 2^105478280221 is an apocalyptic number.

It is an amenable number.

105478280221 is a deficient number, since it is larger than the sum of its proper divisors (2635390045).

105478280221 is an frugal number, since it uses more digits than its factorization.

105478280221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62747423 (or 62747382 counting only the distinct ones).

The product of its (nonzero) digits is 71680, while the sum is 40.

The spelling of 105478280221 in words is "one hundred five billion, four hundred seventy-eight million, two hundred eighty thousand, two hundred twenty-one".