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BaseRepresentation
bin1100001011111…
…00010011000101
321010100100211212
412011330103011
5202132032442
614050541205
72350602254
oct605742305
9233310755
10102220997
115277916a
122a297805
13182406c8
14d80c79b
158e92a82
hex617c4c5

102220997 has 2 divisors, whose sum is σ = 102220998. Its totient is φ = 102220996.

The previous prime is 102220967. The next prime is 102221071. The reversal of 102220997 is 799022201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 94206436 + 8014561 = 9706^2 + 2831^2 .

It is an emirp because it is prime and its reverse (799022201) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 102220997 - 210 = 102219973 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102220957) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51110498 + 51110499.

It is an arithmetic number, because the mean of its divisors is an integer number (51110499).

Almost surely, 2102220997 is an apocalyptic number.

It is an amenable number.

102220997 is a deficient number, since it is larger than the sum of its proper divisors (1).

102220997 is an equidigital number, since it uses as much as digits as its factorization.

102220997 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4536, while the sum is 32.

The square root of 102220997 is about 10110.4400003165. The cubic root of 102220997 is about 467.5700708071.

The spelling of 102220997 in words is "one hundred two million, two hundred twenty thousand, nine hundred ninety-seven".