220745487 has 8 divisors (see below), whose sum is σ = 295853104. Its totient is φ = 146400768.

The previous prime is 220745479. The next prime is 220745501. The reversal of 220745487 is 784547022.

220745487 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 220745487 - 2³ = 220745479 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220745407) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 190048 + ... + 191205.

It is an arithmetic number, because the mean of its divisors is an integer number (36981638).

Almost surely, 2^220745487 is an apocalyptic number.

220745487 is a deficient number, since it is larger than the sum of its proper divisors (75107617).

220745487 is a wasteful number, since it uses less digits than its factorization.

220745487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 381449.

The product of its (nonzero) digits is 125440, while the sum is 39.

The square root of 220745487 is about 14857.5060827852. The cubic root of 220745487 is about 604.3621782550.

The spelling of 220745487 in words is "two hundred twenty million, seven hundred forty-five thousand, four hundred eighty-seven".