2151183197 has 2 divisors, whose sum is σ = 2151183198. Its totient is φ = 2151183196.

The previous prime is 2151183187. The next prime is 2151183241. The reversal of 2151183197 is 7913811512.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1107957796 + 1043225401 = 33286^2 + 32299^2 .

It is a cyclic number.

It is not a de Polignac number, because 2151183197 - 2¹⁴ = 2151166813 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2151183197.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2151183107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1075591598 + 1075591599.

It is an arithmetic number, because the mean of its divisors is an integer number (1075591599).

Almost surely, 2^2151183197 is an apocalyptic number.

It is an amenable number.

2151183197 is a deficient number, since it is larger than the sum of its proper divisors (1).

2151183197 is an equidigital number, since it uses as much as digits as its factorization.

2151183197 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15120, while the sum is 38.

The square root of 2151183197 is about 46380.8494639760. The cubic root of 2151183197 is about 1290.8995982553.

The spelling of 2151183197 in words is "two billion, one hundred fifty-one million, one hundred eighty-three thousand, one hundred ninety-seven".