7550955121 has 2 divisors, whose sum is σ = 7550955122. Its totient is φ = 7550955120.
The previous prime is 7550955073. The next prime is 7550955133. The reversal of 7550955121 is 1215590557.
It is a happy number.
It is a strong prime.
It can be written as a sum of positive squares in only one way, i.e., 5745640000 + 1805315121 = 75800^2 + 42489^2 .
It is an emirp because it is prime and its reverse (1215590557) is a distict prime.
It is a cyclic number.
It is not a de Polignac number, because 7550955121 - 217 = 7550824049 is a prime.
It is a super-2 number, since 2×75509551212 (a number of 21 digits) contains 22 as substring.
It is not a weakly prime, because it can be changed into another prime (7550952121) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3775477560 + 3775477561.
It is an arithmetic number, because the mean of its divisors is an integer number (3775477561).
Almost surely, 27550955121 is an apocalyptic number.
It is an amenable number.
7550955121 is a deficient number, since it is larger than the sum of its proper divisors (1).
7550955121 is an equidigital number, since it uses as much as digits as its factorization.
7550955121 is an odious number, because the sum of its binary digits is odd.
The product of its (nonzero) digits is 78750, while the sum is 40.
The square root of 7550955121 is about 86896.2319148535. The cubic root of 7550955121 is about 1961.8567647903.
The spelling of 7550955121 in words is "seven billion, five hundred fifty million, nine hundred fifty-five thousand, one hundred twenty-one".
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