2545555451 has 4 divisors (see below), whose sum is σ = 2564987304. Its totient is φ = 2526123600.

The previous prime is 2545555427. The next prime is 2545555477. The reversal of 2545555451 is 1545555452.

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

It is a cyclic number.

It is not a de Polignac number, because 2545555451 - 2⁶ = 2545555387 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2545555399 and 2545555408.

It is not an unprimeable number, because it can be changed into a prime (2545555651) 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, 9715730 + ... + 9715991.

It is an arithmetic number, because the mean of its divisors is an integer number (641246826).

Almost surely, 2^2545555451 is an apocalyptic number.

2545555451 is a deficient number, since it is larger than the sum of its proper divisors (19431853).

2545555451 is a wasteful number, since it uses less digits than its factorization.

2545555451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19431852.

The product of its digits is 500000, while the sum is 41.

The square root of 2545555451 is about 50453.4979064881. The cubic root of 2545555451 is about 1365.4030039057.

Subtracting from 2545555451 its reverse (1545555452), we obtain a palindrome (999999999).

The spelling of 2545555451 in words is "two billion, five hundred forty-five million, five hundred fifty-five thousand, four hundred fifty-one".