210044451157 has 4 divisors (see below), whose sum is σ = 212404501260. Its totient is φ = 207684401056.

The previous prime is 210044451083. The next prime is 210044451163. The reversal of 210044451157 is 751154440012.

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 112994133316 + 97050317841 = 336146^2 + 311529^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-210044451157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210044454157) 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, 1180024918 + ... + 1180025095.

It is an arithmetic number, because the mean of its divisors is an integer number (53101125315).

Almost surely, 2^210044451157 is an apocalyptic number.

It is an amenable number.

210044451157 is a deficient number, since it is larger than the sum of its proper divisors (2360050103).

210044451157 is an equidigital number, since it uses as much as digits as its factorization.

210044451157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2360050102.

The product of its (nonzero) digits is 22400, while the sum is 34.

Adding to 210044451157 its reverse (751154440012), we get a palindrome (961198891169).

The spelling of 210044451157 in words is "two hundred ten billion, forty-four million, four hundred fifty-one thousand, one hundred fifty-seven".