220154409 has 8 divisors (see below), whose sum is σ = 326154720. Its totient is φ = 146769588.

The previous prime is 220154383. The next prime is 220154411. The reversal of 220154409 is 904451022.

220154409 is a `hidden beast` number, since 2 + 201 + 54 + 409 = 666.

220154409 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 220154409 - 2⁵ = 220154377 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 8153867 = 220154409 / (2 + 2 + 0 + 1 + 5 + 4 + 4 + 0 + 9).

It is not an unprimeable number, because it can be changed into a prime (220154419) 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, 4076907 + ... + 4076960.

It is an arithmetic number, because the mean of its divisors is an integer number (40769340).

Almost surely, 2^220154409 is an apocalyptic number.

It is an amenable number.

220154409 is a deficient number, since it is larger than the sum of its proper divisors (106000311).

220154409 is an equidigital number, since it uses as much as digits as its factorization.

220154409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8153876 (or 8153870 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 220154409 is about 14837.6011875235. The cubic root of 220154409 is about 603.8222736673.

The spelling of 220154409 in words is "two hundred twenty million, one hundred fifty-four thousand, four hundred nine".