2185213471937 has 2 divisors, whose sum is σ = 2185213471938. Its totient is φ = 2185213471936.

The previous prime is 2185213471933. The next prime is 2185213472009. The reversal of 2185213471937 is 7391743125812.

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., 1174804525456 + 1010408946481 = 1083884^2 + 1005191^2 .

It is a cyclic number.

It is not a de Polignac number, because 2185213471937 - 2² = 2185213471933 is a prime.

It is a super-3 number, since 3×2185213471937³ (a number of 38 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (2185213471933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1092606735968 + 1092606735969.

It is an arithmetic number, because the mean of its divisors is an integer number (1092606735969).

Almost surely, 2^{2185213471937} is an apocalyptic number.

It is an amenable number.

2185213471937 is a deficient number, since it is larger than the sum of its proper divisors (1).

2185213471937 is an equidigital number, since it uses as much as digits as its factorization.

2185213471937 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2540160, while the sum is 53.

The spelling of 2185213471937 in words is "two trillion, one hundred eighty-five billion, two hundred thirteen million, four hundred seventy-one thousand, nine hundred thirty-seven".