220280312405 has 8 divisors (see below), whose sum is σ = 264396518712. Its totient is φ = 176184154048.

The previous prime is 220280312393. The next prime is 220280312437. The reversal of 220280312405 is 504213082022.

It can be written as a sum of positive squares in 4 ways, for example, as 17024508484 + 203255803921 = 130478^2 + 450839^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 220280312405 - 2⁶ = 220280312341 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4987802 + ... + 5031771.

It is an arithmetic number, because the mean of its divisors is an integer number (33049564839).

Almost surely, 2^220280312405 is an apocalyptic number.

It is an amenable number.

220280312405 is a deficient number, since it is larger than the sum of its proper divisors (44116206307).

220280312405 is a wasteful number, since it uses less digits than its factorization.

220280312405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10023975.

The product of its (nonzero) digits is 7680, while the sum is 29.

Adding to 220280312405 its reverse (504213082022), we get a palindrome (724493394427).

The spelling of 220280312405 in words is "two hundred twenty billion, two hundred eighty million, three hundred twelve thousand, four hundred five".