245542205 has 4 divisors (see below), whose sum is σ = 294650652. Its totient is φ = 196433760.

The previous prime is 245542123. The next prime is 245542207. The reversal of 245542205 is 502245542.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 502245542 = 2 ⋅251122771.

It can be written as a sum of positive squares in 2 ways, for example, as 190826596 + 54715609 = 13814^2 + 7397^2 .

It is not a de Polignac number, because 245542205 - 2¹⁰ = 245541181 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (245542207) 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, 24554216 + ... + 24554225.

It is an arithmetic number, because the mean of its divisors is an integer number (73662663).

Almost surely, 2^245542205 is an apocalyptic number.

It is an amenable number.

245542205 is a deficient number, since it is larger than the sum of its proper divisors (49108447).

245542205 is an equidigital number, since it uses as much as digits as its factorization.

245542205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49108446.

The product of its (nonzero) digits is 16000, while the sum is 29.

The square root of 245542205 is about 15669.7863737831. The cubic root of 245542205 is about 626.1937334824.

Adding to 245542205 its reverse (502245542), we get a palindrome (747787747).

The spelling of 245542205 in words is "two hundred forty-five million, five hundred forty-two thousand, two hundred five".