245551505 has 8 divisors (see below), whose sum is σ = 294815400. Its totient is φ = 196338816.

The previous prime is 245551489. The next prime is 245551507. The reversal of 245551505 is 505155542.

It can be written as a sum of positive squares in 4 ways, for example, as 142468096 + 103083409 = 11936^2 + 10153^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 245551505 - 2⁴ = 245551489 is a prime.

It is not an unprimeable number, because it can be changed into a prime (245551507) 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 7 ways as a sum of consecutive naturals, for example, 1310 + ... + 22199.

It is an arithmetic number, because the mean of its divisors is an integer number (36851925).

Almost surely, 2^245551505 is an apocalyptic number.

It is an amenable number.

245551505 is a deficient number, since it is larger than the sum of its proper divisors (49263895).

245551505 is a wasteful number, since it uses less digits than its factorization.

245551505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25603.

The product of its (nonzero) digits is 25000, while the sum is 32.

The square root of 245551505 is about 15670.0831203922. The cubic root of 245551505 is about 626.2016391541.

The spelling of 245551505 in words is "two hundred forty-five million, five hundred fifty-one thousand, five hundred five".