253217473 has 4 divisors (see below), whose sum is σ = 261949140. Its totient is φ = 244485808.

The previous prime is 253217449. The next prime is 253217477. The reversal of 253217473 is 374712352.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 103693489 + 149523984 = 10183^2 + 12228^2 .

It is a cyclic number.

It is not a de Polignac number, because 253217473 - 2⁵ = 253217441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (253217477) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4365790 + ... + 4365847.

It is an arithmetic number, because the mean of its divisors is an integer number (65487285).

Almost surely, 2^253217473 is an apocalyptic number.

It is an amenable number.

253217473 is a deficient number, since it is larger than the sum of its proper divisors (8731667).

253217473 is an equidigital number, since it uses as much as digits as its factorization.

253217473 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8731666.

The product of its digits is 35280, while the sum is 34.

The square root of 253217473 is about 15912.8084573403. The cubic root of 253217473 is about 632.6515214484.

The spelling of 253217473 in words is "two hundred fifty-three million, two hundred seventeen thousand, four hundred seventy-three".