2154255145 has 8 divisors (see below), whose sum is σ = 2954407104. Its totient is φ = 1477203504.

The previous prime is 2154255143. The next prime is 2154255149. The reversal of 2154255145 is 5415524512.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2154255145 - 2¹ = 2154255143 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2154255145.

It is not an unprimeable number, because it can be changed into a prime (2154255143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30775039 + ... + 30775108.

It is an arithmetic number, because the mean of its divisors is an integer number (369300888).

Almost surely, 2^2154255145 is an apocalyptic number.

It is an amenable number.

2154255145 is a deficient number, since it is larger than the sum of its proper divisors (800151959).

2154255145 is an equidigital number, since it uses as much as digits as its factorization.

2154255145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61550159.

The product of its digits is 40000, while the sum is 34.

The square root of 2154255145 is about 46413.9542056050. The cubic root of 2154255145 is about 1291.5137858786.

Adding to 2154255145 its reverse (5415524512), we get a palindrome (7569779657).

The spelling of 2154255145 in words is "two billion, one hundred fifty-four million, two hundred fifty-five thousand, one hundred forty-five".