2154600545 has 4 divisors (see below), whose sum is σ = 2585520660. Its totient is φ = 1723680432.

The previous prime is 2154600541. The next prime is 2154600583. The reversal of 2154600545 is 5450064512.

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 433014481 + 1721586064 = 20809^2 + 41492^2 .

It is a cyclic number.

It is not a de Polignac number, because 2154600545 - 2² = 2154600541 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2154600541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 215460050 + ... + 215460059.

It is an arithmetic number, because the mean of its divisors is an integer number (646380165).

Almost surely, 2^2154600545 is an apocalyptic number.

It is an amenable number.

2154600545 is a deficient number, since it is larger than the sum of its proper divisors (430920115).

2154600545 is an equidigital number, since it uses as much as digits as its factorization.

2154600545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 430920114.

The product of its (nonzero) digits is 24000, while the sum is 32.

The square root of 2154600545 is about 46417.6749202284. The cubic root of 2154600545 is about 1291.5828066449.

The spelling of 2154600545 in words is "two billion, one hundred fifty-four million, six hundred thousand, five hundred forty-five".