51965830 has 16 divisors (see below), whose sum is σ = 106901280. Its totient is φ = 17816832.

The previous prime is 51965791. The next prime is 51965857. The reversal of 51965830 is 3856915.

It is a self number, because there is not a number n which added to its sum of digits gives 51965830.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 371115 + ... + 371254.

It is an arithmetic number, because the mean of its divisors is an integer number (6681330).

Almost surely, 2^51965830 is an apocalyptic number.

51965830 is an abundant number, since it is smaller than the sum of its proper divisors (54935450).

51965830 is a wasteful number, since it uses less digits than its factorization.

51965830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 742383.

The product of its (nonzero) digits is 32400, while the sum is 37.

The square root of 51965830 is about 7208.7328983671. The cubic root of 51965830 is about 373.1693414173.

It can be divided in two parts, 5196 and 5830, that added together give a triangular number (11026 = T₁₄₈).

The spelling of 51965830 in words is "fifty-one million, nine hundred sixty-five thousand, eight hundred thirty".