51987702 has 32 divisors (see below), whose sum is σ = 112260960. Its totient is φ = 15955200.

The previous prime is 51987679. The next prime is 51987707. The reversal of 51987702 is 20778915.

51987702 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51987707) 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 15 ways as a sum of consecutive naturals, for example, 46324 + ... + 47432.

It is an arithmetic number, because the mean of its divisors is an integer number (3508155).

Almost surely, 2^51987702 is an apocalyptic number.

51987702 is an abundant number, since it is smaller than the sum of its proper divisors (60273258).

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

51987702 is a wasteful number, since it uses less digits than its factorization.

51987702 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1728.

The product of its (nonzero) digits is 35280, while the sum is 39.

The square root of 51987702 is about 7210.2497876287. The cubic root of 51987702 is about 373.2216887322.

The spelling of 51987702 in words is "fifty-one million, nine hundred eighty-seven thousand, seven hundred two".