51530641 has 8 divisors (see below), whose sum is σ = 55505120.
Its totient is φ = 47682432.
The previous prime is 51530629. The next prime is 51530653. The reversal of 51530641 is 14603515.
It is an interprime number because it is at equal distance from previous prime (51530629) and next prime (51530653).
It is a sphenic number, since it is the product of 3 distinct primes.
It is a cyclic number.
It is not a de Polignac number, because 51530641 - 211 = 51528593 is a prime.
It is a Duffinian number.
It is not an unprimeable number, because it can be changed into a prime (51533641) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (11) of ones.
It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30720 + ... + 32353.
It is an arithmetic number, because the mean of its divisors is an integer number (6938140).
Almost surely, 251530641 is an apocalyptic number.
51530641 is the 4145-th hex number.
It is an amenable number.
51530641 is a deficient number, since it is larger than the sum of its proper divisors (3974479).
51530641 is a wasteful number, since it uses less digits than its factorization.
51530641 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 63135.
The product of its (nonzero) digits is 1800, while the sum is 25.
The square root of 51530641 is about 7178.4845893824.
The cubic root of 51530641 is about 372.1247148996.
The spelling of 51530641 in words is "fifty-one million, five hundred thirty thousand, six hundred forty-one".