215200134377 has 2 divisors, whose sum is σ = 215200134378. Its totient is φ = 215200134376.

The previous prime is 215200134371. The next prime is 215200134407. The reversal of 215200134377 is 773431002512.

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., 191869404841 + 23330729536 = 438029^2 + 152744^2 .

It is a cyclic number.

It is not a de Polignac number, because 215200134377 - 2⁶ = 215200134313 is a prime.

It is a super-2 number, since 2×215200134377² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (215200134371) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107600067188 + 107600067189.

It is an arithmetic number, because the mean of its divisors is an integer number (107600067189).

Almost surely, 2^215200134377 is an apocalyptic number.

It is an amenable number.

215200134377 is a deficient number, since it is larger than the sum of its proper divisors (1).

215200134377 is an equidigital number, since it uses as much as digits as its factorization.

215200134377 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 35280, while the sum is 35.

Adding to 215200134377 its reverse (773431002512), we get a palindrome (988631136889).

The spelling of 215200134377 in words is "two hundred fifteen billion, two hundred million, one hundred thirty-four thousand, three hundred seventy-seven".