2551400245 has 4 divisors (see below), whose sum is σ = 3061680300. Its totient is φ = 2041120192.

The previous prime is 2551400221. The next prime is 2551400261. The reversal of 2551400245 is 5420041552.

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 350101521 + 2201298724 = 18711^2 + 46918^2 .

It is a cyclic number.

It is not a de Polignac number, because 2551400245 - 2¹⁷ = 2551269173 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 255140020 + ... + 255140029.

It is an arithmetic number, because the mean of its divisors is an integer number (765420075).

Almost surely, 2^2551400245 is an apocalyptic number.

It is an amenable number.

2551400245 is a deficient number, since it is larger than the sum of its proper divisors (510280055).

2551400245 is an equidigital number, since it uses as much as digits as its factorization.

2551400245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 510280054.

The product of its (nonzero) digits is 8000, while the sum is 28.

The square root of 2551400245 is about 50511.3872804935. The cubic root of 2551400245 is about 1366.4472290618.

Adding to 2551400245 its reverse (5420041552), we get a palindrome (7971441797).

The spelling of 2551400245 in words is "two billion, five hundred fifty-one million, four hundred thousand, two hundred forty-five".