216225087459397 has 2 divisors, whose sum is σ = 216225087459398. Its totient is φ = 216225087459396.

The previous prime is 216225087459307. The next prime is 216225087459541. The reversal of 216225087459397 is 793954780522612.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 120365342400996 + 95859745058401 = 10971114^2 + 9790799^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-216225087459397 is a prime.

It is a super-2 number, since 2×216225087459397² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (216225087459307) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108112543729698 + 108112543729699.

It is an arithmetic number, because the mean of its divisors is an integer number (108112543729699).

It is a 1-persistent number, because it is pandigital, but 2⋅216225087459397 = 432450174918794 is not.

Almost surely, 2^{216225087459397} is an apocalyptic number.

It is an amenable number.

216225087459397 is a deficient number, since it is larger than the sum of its proper divisors (1).

216225087459397 is an equidigital number, since it uses as much as digits as its factorization.

216225087459397 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 457228800, while the sum is 70.

The spelling of 216225087459397 in words is "two hundred sixteen trillion, two hundred twenty-five billion, eighty-seven million, four hundred fifty-nine thousand, three hundred ninety-seven".