51742775 has 18 divisors (see below), whose sum is σ = 74638080. Its totient is φ = 35479920.

The previous prime is 51742753. The next prime is 51742777. The reversal of 51742775 is 57724715.

It is not a de Polignac number, because 51742775 - 2⁶ = 51742711 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51742777) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 19895 + ... + 22344.

It is an arithmetic number, because the mean of its divisors is an integer number (4146560).

Almost surely, 2^51742775 is an apocalyptic number.

51742775 is a deficient number, since it is larger than the sum of its proper divisors (22895305).

51742775 is a wasteful number, since it uses less digits than its factorization.

51742775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42263 (or 42251 counting only the distinct ones).

The product of its digits is 68600, while the sum is 38.

The square root of 51742775 is about 7193.2450952265. The cubic root of 51742775 is about 372.6346524591.

The spelling of 51742775 in words is "fifty-one million, seven hundred forty-two thousand, seven hundred seventy-five".