51969419 has 4 divisors (see below), whose sum is σ = 52045320. Its totient is φ = 51893520.

The previous prime is 51969367. The next prime is 51969431. The reversal of 51969419 is 91496915.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 51969419 - 2¹⁶ = 51903883 is a prime.

It is a super-2 number, since 2×51969419² = 5401641022395122, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 51969419.

It is not an unprimeable number, because it can be changed into a prime (51969469) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36914 + ... + 38295.

It is an arithmetic number, because the mean of its divisors is an integer number (13011330).

Almost surely, 2^51969419 is an apocalyptic number.

51969419 is a deficient number, since it is larger than the sum of its proper divisors (75901).

51969419 is an equidigital number, since it uses as much as digits as its factorization.

51969419 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75900.

The product of its digits is 87480, while the sum is 44.

The square root of 51969419 is about 7208.9818282473. The cubic root of 51969419 is about 373.1779321517.

The spelling of 51969419 in words is "fifty-one million, nine hundred sixty-nine thousand, four hundred nineteen".