51530241 has 8 divisors (see below), whose sum is σ = 78522304. Its totient is φ = 29445840.

The previous prime is 51530207. The next prime is 51530249. The reversal of 51530241 is 14203515.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 51530241 - 2⁷ = 51530113 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 2453821 = 51530241 / (5 + 1 + 5 + 3 + 0 + 2 + 4 + 1).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (51530249) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1226890 + ... + 1226931.

It is an arithmetic number, because the mean of its divisors is an integer number (9815288).

Almost surely, 2^51530241 is an apocalyptic number.

It is an amenable number.

51530241 is a deficient number, since it is larger than the sum of its proper divisors (26992063).

51530241 is a wasteful number, since it uses less digits than its factorization.

51530241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2453831.

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 51530241 is about 7178.4567282947. The cubic root of 51530241 is about 372.1237520403.

Adding to 51530241 its reverse (14203515), we get a palindrome (65733756).

The spelling of 51530241 in words is "fifty-one million, five hundred thirty thousand, two hundred forty-one".