51333630 has 32 divisors (see below), whose sum is σ = 129686400. Its totient is φ = 12968352.

The previous prime is 51333619. The next prime is 51333637. The reversal of 51333630 is 3633315.

It is a self number, because there is not a number n which added to its sum of digits gives 51333630.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51333637) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44460 + ... + 45599.

It is an arithmetic number, because the mean of its divisors is an integer number (4052700).

Almost surely, 2^51333630 is an apocalyptic number.

51333630 is an abundant number, since it is smaller than the sum of its proper divisors (78352770).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51333630 is a wasteful number, since it uses less digits than its factorization.

51333630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90088.

The product of its (nonzero) digits is 2430, while the sum is 24.

The square root of 51333630 is about 7164.7491233120. The cubic root of 51333630 is about 371.6498757946.

Adding to 51333630 its reverse (3633315), we get a palindrome (54966945).

It can be divided in two parts, 513 and 33630, that added together give a palindrome (34143).

The spelling of 51333630 in words is "fifty-one million, three hundred thirty-three thousand, six hundred thirty".