51965479 has 4 divisors (see below), whose sum is σ = 52374784. Its totient is φ = 51556176.

The previous prime is 51965471. The next prime is 51965497. The reversal of 51965479 is 97456915.

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 51965479 - 2³ = 51965471 is a prime.

It is a super-2 number, since 2×51965479² = 5400822015398882, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51965471) 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, 204462 + ... + 204715.

It is an arithmetic number, because the mean of its divisors is an integer number (13093696).

Almost surely, 2^51965479 is an apocalyptic number.

51965479 is a deficient number, since it is larger than the sum of its proper divisors (409305).

51965479 is a wasteful number, since it uses less digits than its factorization.

51965479 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 409304.

The product of its digits is 340200, while the sum is 46.

The square root of 51965479 is about 7208.7085528547. The cubic root of 51965479 is about 373.1685012322.

The spelling of 51965479 in words is "fifty-one million, nine hundred sixty-five thousand, four hundred seventy-nine".