2156443215430 has 32 divisors (see below), whose sum is σ = 4437247746816. Its totient is φ = 739162628064.

The previous prime is 2156443215401. The next prime is 2156443215457. The reversal of 2156443215430 is 345123446512.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3668964 + ... + 4215943.

It is an arithmetic number, because the mean of its divisors is an integer number (138663992088).

Almost surely, 2^{2156443215430} is an apocalyptic number.

2156443215430 is an abundant number, since it is smaller than the sum of its proper divisors (2280804531386).

2156443215430 is a wasteful number, since it uses less digits than its factorization.

2156443215430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7888828.

The product of its (nonzero) digits is 345600, while the sum is 40.

The spelling of 2156443215430 in words is "two trillion, one hundred fifty-six billion, four hundred forty-three million, two hundred fifteen thousand, four hundred thirty".