2123157206 has 4 divisors (see below), whose sum is σ = 3184735812. Its totient is φ = 1061578602.

The previous prime is 2123157139. The next prime is 2123157247. The reversal of 2123157206 is 6027513212.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 530789300 + ... + 530789303.

It is an arithmetic number, because the mean of its divisors is an integer number (796183953).

Almost surely, 2^2123157206 is an apocalyptic number.

2123157206 is a deficient number, since it is larger than the sum of its proper divisors (1061578606).

2123157206 is a wasteful number, since it uses less digits than its factorization.

2123157206 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1061578605.

The product of its (nonzero) digits is 5040, while the sum is 29.

The square root of 2123157206 is about 46077.7300439160. The cubic root of 2123157206 is about 1285.2690531613.

The spelling of 2123157206 in words is "two billion, one hundred twenty-three million, one hundred fifty-seven thousand, two hundred six".