65131775 has 18 divisors (see below), whose sum is σ = 83483496. Its totient is φ = 50406000.

The previous prime is 65131763. The next prime is 65131783. The reversal of 65131775 is 57713156.

It is not a de Polignac number, because 65131775 - 2⁶ = 65131711 is a prime.

It is a super-3 number, since 3×65131775³ (a number of 24 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 22670 + ... + 25380.

It is an arithmetic number, because the mean of its divisors is an integer number (4637972).

Almost surely, 2^65131775 is an apocalyptic number.

65131775 is a deficient number, since it is larger than the sum of its proper divisors (18351721).

65131775 is a wasteful number, since it uses less digits than its factorization.

65131775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2783 (or 2747 counting only the distinct ones).

The product of its digits is 22050, while the sum is 35.

The square root of 65131775 is about 8070.4259491058. The cubic root of 65131775 is about 402.3441007286.

The spelling of 65131775 in words is "sixty-five million, one hundred thirty-one thousand, seven hundred seventy-five".