2156493073 has 8 divisors (see below), whose sum is σ = 2498325248. Its totient is φ = 1823101344.

The previous prime is 2156493067. The next prime is 2156493077. The reversal of 2156493073 is 3703946512.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2156493073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2156493077) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2109561 + ... + 2110582.

It is an arithmetic number, because the mean of its divisors is an integer number (312290656).

Almost surely, 2^2156493073 is an apocalyptic number.

It is an amenable number.

2156493073 is a deficient number, since it is larger than the sum of its proper divisors (341832175).

2156493073 is an equidigital number, since it uses as much as digits as its factorization.

2156493073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4220223.

The product of its (nonzero) digits is 136080, while the sum is 40.

The square root of 2156493073 is about 46438.0563008402. The cubic root of 2156493073 is about 1291.9608568130.

The spelling of 2156493073 in words is "two billion, one hundred fifty-six million, four hundred ninety-three thousand, seventy-three".