2154420265 has 16 divisors (see below), whose sum is σ = 2630813760. Its totient is φ = 1693264320.

The previous prime is 2154420199. The next prime is 2154420269. The reversal of 2154420265 is 5620244512.

It is not a de Polignac number, because 2154420265 - 2⁷ = 2154420137 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2154420269) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 285106 + ... + 292564.

It is an arithmetic number, because the mean of its divisors is an integer number (164425860).

Almost surely, 2^2154420265 is an apocalyptic number.

It is an amenable number.

2154420265 is a deficient number, since it is larger than the sum of its proper divisors (476393495).

2154420265 is an equidigital number, since it uses as much as digits as its factorization.

2154420265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8472.

The product of its (nonzero) digits is 19200, while the sum is 31.

The square root of 2154420265 is about 46415.7329469222. The cubic root of 2154420265 is about 1291.5467824820.

Adding to 2154420265 its reverse (5620244512), we get a palindrome (7774664777).

The spelling of 2154420265 in words is "two billion, one hundred fifty-four million, four hundred twenty thousand, two hundred sixty-five".