51630531 has 8 divisors (see below), whose sum is σ = 71061504. Its totient is φ = 33309960.

The previous prime is 51630473. The next prime is 51630539. The reversal of 51630531 is 13503615.

51630531 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 51630531 - 2¹¹ = 51628483 is a prime.

It is a super-2 number, since 2×51630531² = 5331423462683922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51630539) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 277491 + ... + 277676.

It is an arithmetic number, because the mean of its divisors is an integer number (8882688).

Almost surely, 2^51630531 is an apocalyptic number.

51630531 is a deficient number, since it is larger than the sum of its proper divisors (19430973).

51630531 is a wasteful number, since it uses less digits than its factorization.

51630531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 555201.

The product of its (nonzero) digits is 1350, while the sum is 24.

The square root of 51630531 is about 7185.4388174975. The cubic root of 51630531 is about 372.3650091168.

The spelling of 51630531 in words is "fifty-one million, six hundred thirty thousand, five hundred thirty-one".