107765221 has 2 divisors, whose sum is σ = 107765222. Its totient is φ = 107765220.

The previous prime is 107765197. The next prime is 107765233. The reversal of 107765221 is 122567701.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 90041121 + 17724100 = 9489^2 + 4210^2 .

It is an emirp because it is prime and its reverse (122567701) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-107765221 is a prime.

It is a super-2 number, since 2×107765221² = 23226685714357682, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (107765521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 53882610 + 53882611.

It is an arithmetic number, because the mean of its divisors is an integer number (53882611).

Almost surely, 2^107765221 is an apocalyptic number.

It is an amenable number.

107765221 is a deficient number, since it is larger than the sum of its proper divisors (1).

107765221 is an equidigital number, since it uses as much as digits as its factorization.

107765221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5880, while the sum is 31.

The square root of 107765221 is about 10381.0028898946. The cubic root of 107765221 is about 475.8749833514.

The spelling of 107765221 in words is "one hundred seven million, seven hundred sixty-five thousand, two hundred twenty-one".