2154043235 has 4 divisors (see below), whose sum is σ = 2584851888. Its totient is φ = 1723234584.

The previous prime is 2154043217. The next prime is 2154043249. The reversal of 2154043235 is 5323404512.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2154043235 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2154043198 and 2154043207.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 215404319 + ... + 215404328.

It is an arithmetic number, because the mean of its divisors is an integer number (646212972).

Almost surely, 2^2154043235 is an apocalyptic number.

2154043235 is a deficient number, since it is larger than the sum of its proper divisors (430808653).

2154043235 is an equidigital number, since it uses as much as digits as its factorization.

2154043235 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 430808652.

The product of its (nonzero) digits is 14400, while the sum is 29.

The square root of 2154043235 is about 46411.6713230627. The cubic root of 2154043235 is about 1291.4714365680.

Adding to 2154043235 its reverse (5323404512), we get a palindrome (7477447747).

The spelling of 2154043235 in words is "two billion, one hundred fifty-four million, forty-three thousand, two hundred thirty-five".