2156442430 has 16 divisors (see below), whose sum is σ = 4085891280. Its totient is φ = 817178112.

The previous prime is 2156442427. The next prime is 2156442439. The reversal of 2156442430 is 342446512.

It is a junction number, because it is equal to n+sod(n) for n = 2156442392 and 2156442401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2156442439) 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, 5674659 + ... + 5675038.

It is an arithmetic number, because the mean of its divisors is an integer number (255368205).

Almost surely, 2^2156442430 is an apocalyptic number.

2156442430 is a deficient number, since it is larger than the sum of its proper divisors (1929448850).

2156442430 is a wasteful number, since it uses less digits than its factorization.

2156442430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11349723.

The product of its (nonzero) digits is 23040, while the sum is 31.

The square root of 2156442430 is about 46437.5110228789. The cubic root of 2156442430 is about 1291.9507432809.

Adding to 2156442430 its reverse (342446512), we get a palindrome (2498888942).

The spelling of 2156442430 in words is "two billion, one hundred fifty-six million, four hundred forty-two thousand, four hundred thirty".