51213702 has 16 divisors (see below), whose sum is σ = 107818560. Its totient is φ = 16172712.

The previous prime is 51213689. The next prime is 51213737. The reversal of 51213702 is 20731215.

51213702 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

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, 224508 + ... + 224735.

It is an arithmetic number, because the mean of its divisors is an integer number (6738660).

Almost surely, 2^51213702 is an apocalyptic number.

51213702 is an abundant number, since it is smaller than the sum of its proper divisors (56604858).

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

51213702 is a wasteful number, since it uses less digits than its factorization.

51213702 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 449267.

The product of its (nonzero) digits is 420, while the sum is 21.

The square root of 51213702 is about 7156.3749203071. The cubic root of 51213702 is about 371.3602282399.

Adding to 51213702 its reverse (20731215), we get a palindrome (71944917).

It can be divided in two parts, 51213 and 702, that added together give a palindrome (51915).

The spelling of 51213702 in words is "fifty-one million, two hundred thirteen thousand, seven hundred two".