51563501 has 8 divisors (see below), whose sum is σ = 56929824. Its totient is φ = 46310320.

The previous prime is 51563497. The next prime is 51563503. The reversal of 51563501 is 10536515.

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 51563501 - 2² = 51563497 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51563503) 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, 27326 + ... + 29151.

It is an arithmetic number, because the mean of its divisors is an integer number (7116228).

Almost surely, 2^51563501 is an apocalyptic number.

It is an amenable number.

51563501 is a deficient number, since it is larger than the sum of its proper divisors (5366323).

51563501 is a wasteful number, since it uses less digits than its factorization.

51563501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56571.

The product of its (nonzero) digits is 2250, while the sum is 26.

The square root of 51563501 is about 7180.7730085277. The cubic root of 51563501 is about 372.2037967794.

The spelling of 51563501 in words is "fifty-one million, five hundred sixty-three thousand, five hundred one".