51959439 has 12 divisors (see below), whose sum is σ = 85774416. Its totient is φ = 29691072.

The previous prime is 51959431. The next prime is 51959459. The reversal of 51959439 is 93495915.

It is a happy number.

51959439 is a `hidden beast` number, since 51 + 9 + 594 + 3 + 9 = 666.

It is not a de Polignac number, because 51959439 - 2³ = 51959431 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 51959394 and 51959403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51959431) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 412314 + ... + 412439.

It is an arithmetic number, because the mean of its divisors is an integer number (7147868).

Almost surely, 2^51959439 is an apocalyptic number.

51959439 is a deficient number, since it is larger than the sum of its proper divisors (33814977).

51959439 is a wasteful number, since it uses less digits than its factorization.

51959439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 824766 (or 824763 counting only the distinct ones).

The product of its digits is 218700, while the sum is 45.

The square root of 51959439 is about 7208.2896029502. The cubic root of 51959439 is about 373.1540427551.

The spelling of 51959439 in words is "fifty-one million, nine hundred fifty-nine thousand, four hundred thirty-nine".