245551143 has 4 divisors (see below), whose sum is σ = 327401528. Its totient is φ = 163700760.

The previous prime is 245551087. The next prime is 245551153. The reversal of 245551143 is 341155542.

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

It is not a de Polignac number, because 245551143 - 2⁹ = 245550631 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 245551143.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (245551153) 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, 40925188 + ... + 40925193.

It is an arithmetic number, because the mean of its divisors is an integer number (81850382).

Almost surely, 2^245551143 is an apocalyptic number.

245551143 is a deficient number, since it is larger than the sum of its proper divisors (81850385).

245551143 is an equidigital number, since it uses as much as digits as its factorization.

245551143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81850384.

The product of its digits is 12000, while the sum is 30.

The square root of 245551143 is about 15670.0715697153. The cubic root of 245551143 is about 626.2013314317.

The spelling of 245551143 in words is "two hundred forty-five million, five hundred fifty-one thousand, one hundred forty-three".