51630465 has 8 divisors (see below), whose sum is σ = 82608768. Its totient is φ = 27536240.

The previous prime is 51630451. The next prime is 51630473. The reversal of 51630465 is 56403615.

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

It is not a de Polignac number, because 51630465 - 2¹¹ = 51628417 is a prime.

It is a super-2 number, since 2×51630465² = 5331409832232450, which contains 22 as substring.

It is an unprimeable number.

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, 1721001 + ... + 1721030.

It is an arithmetic number, because the mean of its divisors is an integer number (10326096).

Almost surely, 2^51630465 is an apocalyptic number.

It is an amenable number.

51630465 is a deficient number, since it is larger than the sum of its proper divisors (30978303).

51630465 is a wasteful number, since it uses less digits than its factorization.

51630465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3442039.

The product of its (nonzero) digits is 10800, while the sum is 30.

The square root of 51630465 is about 7185.4342248747. The cubic root of 51630465 is about 372.3648504503.

The spelling of 51630465 in words is "fifty-one million, six hundred thirty thousand, four hundred sixty-five".