2157226593 has 4 divisors (see below), whose sum is σ = 2876302128. Its totient is φ = 1438151060.

The previous prime is 2157226559. The next prime is 2157226601. The reversal of 2157226593 is 3956227512.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2157226593 - 2⁶ = 2157226529 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2157226493) 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 3 ways as a sum of consecutive naturals, for example, 359537763 + ... + 359537768.

It is an arithmetic number, because the mean of its divisors is an integer number (719075532).

Almost surely, 2^2157226593 is an apocalyptic number.

It is an amenable number.

2157226593 is a deficient number, since it is larger than the sum of its proper divisors (719075535).

2157226593 is an equidigital number, since it uses as much as digits as its factorization.

2157226593 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 719075534.

The product of its digits is 226800, while the sum is 42.

The square root of 2157226593 is about 46445.9534620617. The cubic root of 2157226593 is about 1292.1073248155.

The spelling of 2157226593 in words is "two billion, one hundred fifty-seven million, two hundred twenty-six thousand, five hundred ninety-three".