51939775 has 6 divisors (see below), whose sum is σ = 64405352. Its totient is φ = 41551800.

The previous prime is 51939763. The next prime is 51939791. The reversal of 51939775 is 57793915.

It is a happy number.

It is not a de Polignac number, because 51939775 - 2¹¹ = 51937727 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1038771 + ... + 1038820.

Almost surely, 2^51939775 is an apocalyptic number.

51939775 is a deficient number, since it is larger than the sum of its proper divisors (12465577).

51939775 is a wasteful number, since it uses less digits than its factorization.

51939775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2077601 (or 2077596 counting only the distinct ones).

The product of its digits is 297675, while the sum is 46.

The square root of 51939775 is about 7206.9254887226. The cubic root of 51939775 is about 373.1069635520.

The spelling of 51939775 in words is "fifty-one million, nine hundred thirty-nine thousand, seven hundred seventy-five".