2154030145 has 4 divisors (see below), whose sum is σ = 2584836180. Its totient is φ = 1723224112.

The previous prime is 2154030127. The next prime is 2154030149. The reversal of 2154030145 is 5410304512.

It is a happy number.

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 1498618944 + 655411201 = 38712^2 + 25601^2 .

It is a cyclic number.

It is not a de Polignac number, because 2154030145 - 2¹³ = 2154021953 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2154030149) 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, 215403010 + ... + 215403019.

It is an arithmetic number, because the mean of its divisors is an integer number (646209045).

Almost surely, 2^2154030145 is an apocalyptic number.

It is an amenable number.

2154030145 is a deficient number, since it is larger than the sum of its proper divisors (430806035).

2154030145 is an equidigital number, since it uses as much as digits as its factorization.

2154030145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 430806034.

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 2154030145 is about 46411.5303022859. The cubic root of 2154030145 is about 1291.4688204961.

Adding to 2154030145 its reverse (5410304512), we get a palindrome (7564334657).

The spelling of 2154030145 in words is "two billion, one hundred fifty-four million, thirty thousand, one hundred forty-five".