2154421423 has 16 divisors (see below), whose sum is σ = 2687122944. Its totient is φ = 1678088160.

The previous prime is 2154421421. The next prime is 2154421427. The reversal of 2154421423 is 3241244512.

2154421423 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2154421423 - 2¹ = 2154421421 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2154421391 and 2154421400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2154421421) 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, 273861 + ... + 281617.

It is an arithmetic number, because the mean of its divisors is an integer number (167945184).

Almost surely, 2^2154421423 is an apocalyptic number.

2154421423 is a deficient number, since it is larger than the sum of its proper divisors (532701521).

2154421423 is a wasteful number, since it uses less digits than its factorization.

2154421423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11382.

The product of its digits is 7680, while the sum is 28.

The square root of 2154421423 is about 46415.7454211392. The cubic root of 2154421423 is about 1291.5470138839.

Adding to 2154421423 its reverse (3241244512), we get a palindrome (5395665935).

Subtracting 2154421423 from its reverse (3241244512), we obtain a square (1086823089 = 32967²).

The spelling of 2154421423 in words is "two billion, one hundred fifty-four million, four hundred twenty-one thousand, four hundred twenty-three".