216370061 has 2 divisors, whose sum is σ = 216370062. Its totient is φ = 216370060.

The previous prime is 216370057. The next prime is 216370087. The reversal of 216370061 is 160073612.

It is an a-pointer prime, because the next prime (216370087) can be obtained adding 216370061 to its sum of digits (26).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 186186025 + 30184036 = 13645^2 + 5494^2 .

It is a cyclic number.

It is not a de Polignac number, because 216370061 - 2² = 216370057 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 216370061.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (216070061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108185030 + 108185031.

It is an arithmetic number, because the mean of its divisors is an integer number (108185031).

Almost surely, 2^216370061 is an apocalyptic number.

It is an amenable number.

216370061 is a deficient number, since it is larger than the sum of its proper divisors (1).

216370061 is an equidigital number, since it uses as much as digits as its factorization.

216370061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1512, while the sum is 26.

The square root of 216370061 is about 14709.5227998736. The cubic root of 216370061 is about 600.3424535795.

The spelling of 216370061 in words is "two hundred sixteen million, three hundred seventy thousand, sixty-one".