245206273 has 4 divisors (see below), whose sum is σ = 264068308. Its totient is φ = 226344240.

The previous prime is 245206231. The next prime is 245206331. The reversal of 245206273 is 372602542.

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 70358544 + 174847729 = 8388^2 + 13223^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-245206273 is a prime.

It is a super-2 number, since 2×245206273² = 120252232637101058, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (245204273) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9430998 + ... + 9431023.

It is an arithmetic number, because the mean of its divisors is an integer number (66017077).

Almost surely, 2^245206273 is an apocalyptic number.

It is an amenable number.

245206273 is a deficient number, since it is larger than the sum of its proper divisors (18862035).

245206273 is a wasteful number, since it uses less digits than its factorization.

245206273 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18862034.

The product of its (nonzero) digits is 20160, while the sum is 31.

The square root of 245206273 is about 15659.0636054650. The cubic root of 245206273 is about 625.9080330826.

The spelling of 245206273 in words is "two hundred forty-five million, two hundred six thousand, two hundred seventy-three".