51703730 has 16 divisors (see below), whose sum is σ = 100225944. Its totient is φ = 19090560.

The previous prime is 51703709. The next prime is 51703733. The reversal of 51703730 is 3730715.

It can be written as a sum of positive squares in 4 ways, for example, as 20912329 + 30791401 = 4573^2 + 5549^2 .

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a self number, because there is not a number n which added to its sum of digits gives 51703730.

It is not an unprimeable number, because it can be changed into a prime (51703733) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 198731 + ... + 198990.

Almost surely, 2^51703730 is an apocalyptic number.

51703730 is a deficient number, since it is larger than the sum of its proper divisors (48522214).

51703730 is a wasteful number, since it uses less digits than its factorization.

51703730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 397741.

The product of its (nonzero) digits is 2205, while the sum is 26.

The square root of 51703730 is about 7190.5305784761. The cubic root of 51703730 is about 372.5408990722.

The spelling of 51703730 in words is "fifty-one million, seven hundred three thousand, seven hundred thirty".