215523125606149 has 2 divisors, whose sum is σ = 215523125606150. Its totient is φ = 215523125606148.

The previous prime is 215523125606111. The next prime is 215523125606177. The reversal of 215523125606149 is 941606521325512.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 108708461532225 + 106814664073924 = 10426335^2 + 10335118^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-215523125606149 is a prime.

It is a super-2 number, since 2×215523125606149² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 215523125606096 and 215523125606105.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (215523125606249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107761562803074 + 107761562803075.

It is an arithmetic number, because the mean of its divisors is an integer number (107761562803075).

Almost surely, 2^{215523125606149} is an apocalyptic number.

It is an amenable number.

215523125606149 is a deficient number, since it is larger than the sum of its proper divisors (1).

215523125606149 is an equidigital number, since it uses as much as digits as its factorization.

215523125606149 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3888000, while the sum is 52.

The spelling of 215523125606149 in words is "two hundred fifteen trillion, five hundred twenty-three billion, one hundred twenty-five million, six hundred six thousand, one hundred forty-nine".