2151230243 has 2 divisors, whose sum is σ = 2151230244. Its totient is φ = 2151230242.

The previous prime is 2151230233. The next prime is 2151230281. The reversal of 2151230243 is 3420321512.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2151230243 is a prime.

It is not a weakly prime, because it can be changed into another prime (2151230203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1075615121 + 1075615122.

It is an arithmetic number, because the mean of its divisors is an integer number (1075615122).

Almost surely, 2^2151230243 is an apocalyptic number.

2151230243 is a deficient number, since it is larger than the sum of its proper divisors (1).

2151230243 is an equidigital number, since it uses as much as digits as its factorization.

2151230243 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 2151230243 is about 46381.3566317330. The cubic root of 2151230243 is about 1290.9090087694.

Adding to 2151230243 its reverse (3420321512), we get a palindrome (5571551755).

The spelling of 2151230243 in words is "two billion, one hundred fifty-one million, two hundred thirty thousand, two hundred forty-three".