220997465 has 8 divisors (see below), whose sum is σ = 285596808. Its totient is φ = 163198080.

The previous prime is 220997459. The next prime is 220997473. The reversal of 220997465 is 564799022.

220997465 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 534361 + 220463104 = 731^2 + 14848^2 .

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

It is not a de Polignac number, because 220997465 - 2⁶ = 220997401 is a prime.

It is a Duffinian 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, 1699916 + ... + 1700045.

It is an arithmetic number, because the mean of its divisors is an integer number (35699601).

Almost surely, 2^220997465 is an apocalyptic number.

It is an amenable number.

220997465 is a deficient number, since it is larger than the sum of its proper divisors (64599343).

220997465 is a wasteful number, since it uses less digits than its factorization.

220997465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3399979.

The product of its (nonzero) digits is 272160, while the sum is 44.

The square root of 220997465 is about 14865.9834857974. The cubic root of 220997465 is about 604.5920479081.

The spelling of 220997465 in words is "two hundred twenty million, nine hundred ninety-seven thousand, four hundred sixty-five".