215388675401 has 2 divisors, whose sum is σ = 215388675402. Its totient is φ = 215388675400.

The previous prime is 215388675373. The next prime is 215388675413. The reversal of 215388675401 is 104576883512.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 134046783376 + 81341892025 = 366124^2 + 285205^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-215388675401 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 215388675401.

It is not a weakly prime, because it can be changed into another prime (215388675001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107694337700 + 107694337701.

It is an arithmetic number, because the mean of its divisors is an integer number (107694337701).

Almost surely, 2^215388675401 is an apocalyptic number.

It is an amenable number.

215388675401 is a deficient number, since it is larger than the sum of its proper divisors (1).

215388675401 is an equidigital number, since it uses as much as digits as its factorization.

215388675401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1612800, while the sum is 50.

The spelling of 215388675401 in words is "two hundred fifteen billion, three hundred eighty-eight million, six hundred seventy-five thousand, four hundred one".