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2222131997 is a prime number
BaseRepresentation
bin1000010001110011…
…0000101100011101
312201212100000001002
42010130300230131
514022331210442
61004300000045
7106031544641
oct20434605435
95655300032
102222131997
11a40376728
12520230025
132954b0307
1417119cc21
15d013e732
hex84730b1d

2222131997 has 2 divisors, whose sum is σ = 2222131998. Its totient is φ = 2222131996.

The previous prime is 2222131939. The next prime is 2222132021. The reversal of 2222131997 is 7991312222.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1780333636 + 441798361 = 42194^2 + 21019^2 .

It is a cyclic number.

It is not a de Polignac number, because 2222131997 - 28 = 2222131741 is a prime.

It is a super-2 number, since 2×22221319972 = 9875741224182416018, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2222131997.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2222131937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1111065998 + 1111065999.

It is an arithmetic number, because the mean of its divisors is an integer number (1111065999).

Almost surely, 22222131997 is an apocalyptic number.

It is an amenable number.

2222131997 is a deficient number, since it is larger than the sum of its proper divisors (1).

2222131997 is an equidigital number, since it uses as much as digits as its factorization.

2222131997 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27216, while the sum is 38.

The square root of 2222131997 is about 47139.4950863923. The cubic root of 2222131997 is about 1304.9382191605.

The spelling of 2222131997 in words is "two billion, two hundred twenty-two million, one hundred thirty-one thousand, nine hundred ninety-seven".