51241183009 has 4 divisors (see below), whose sum is σ = 51248016304.
Its totient is φ = 51234349716.
The previous prime is 51241183001. The next prime is 51241183057. The reversal of 51241183009 is 90038114215.
It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.
It is a cyclic number.
It is not a de Polignac number, because 51241183009 - 23 = 51241183001 is a prime.
It is a Duffinian number.
It is not an unprimeable number, because it can be changed into a prime (51241183001) by changing a digit.
It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3405387 + ... + 3420400.
It is an arithmetic number, because the mean of its divisors is an integer number (12812004076).
Almost surely, 251241183009 is an apocalyptic number.
It is an amenable number.
51241183009 is a deficient number, since it is larger than the sum of its proper divisors (6833295).
51241183009 is an equidigital number, since it uses as much as digits as its factorization.
51241183009 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 6833294.
The product of its (nonzero) digits is 8640, while the sum is 34.
The spelling of 51241183009 in words is "fifty-one billion, two hundred forty-one million, one hundred eighty-three thousand, nine".