220149505 has 4 divisors (see below), whose sum is σ = 264179412. Its totient is φ = 176119600.

The previous prime is 220149481. The next prime is 220149511. The reversal of 220149505 is 505941022.

220149505 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 505941022 = 2 ⋅252970511.

It can be written as a sum of positive squares in 2 ways, for example, as 166332609 + 53816896 = 12897^2 + 7336^2 .

It is a de Polignac number, because none of the positive numbers 2^k-220149505 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22014946 + ... + 22014955.

It is an arithmetic number, because the mean of its divisors is an integer number (66044853).

Almost surely, 2^220149505 is an apocalyptic number.

It is an amenable number.

220149505 is a deficient number, since it is larger than the sum of its proper divisors (44029907).

220149505 is an equidigital number, since it uses as much as digits as its factorization.

220149505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44029906.

The product of its (nonzero) digits is 3600, while the sum is 28.

The square root of 220149505 is about 14837.4359307800. The cubic root of 220149505 is about 603.8177901983.

The spelling of 220149505 in words is "two hundred twenty million, one hundred forty-nine thousand, five hundred five".