253303665 has 16 divisors (see below), whose sum is σ = 416240448. Its totient is φ = 131443776.

The previous prime is 253303663. The next prime is 253303679. The reversal of 253303665 is 566303352.

It is not a de Polignac number, because 253303665 - 2¹ = 253303663 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (253303663) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 227647 + ... + 228756.

It is an arithmetic number, because the mean of its divisors is an integer number (26015028).

Almost surely, 2^253303665 is an apocalyptic number.

It is an amenable number.

253303665 is a deficient number, since it is larger than the sum of its proper divisors (162936783).

253303665 is a wasteful number, since it uses less digits than its factorization.

253303665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 456448.

The product of its (nonzero) digits is 48600, while the sum is 33.

The square root of 253303665 is about 15915.5164854930. The cubic root of 253303665 is about 632.7232954765.

The spelling of 253303665 in words is "two hundred fifty-three million, three hundred three thousand, six hundred sixty-five".