65131028 has 6 divisors (see below), whose sum is σ = 113979306. Its totient is φ = 32565512.

The previous prime is 65131021. The next prime is 65131039. The reversal of 65131028 is 82013156.

It can be written as a sum of positive squares in only one way, i.e., 53173264 + 11957764 = 7292^2 + 3458^2 .

It is a junction number, because it is equal to n+sod(n) for n = 65130988 and 65131006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65131021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8141375 + ... + 8141382.

It is an arithmetic number, because the mean of its divisors is an integer number (18996551).

Almost surely, 2^65131028 is an apocalyptic number.

It is an amenable number.

65131028 is a deficient number, since it is larger than the sum of its proper divisors (48848278).

65131028 is a wasteful number, since it uses less digits than its factorization.

65131028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16282761 (or 16282759 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 26.

The square root of 65131028 is about 8070.3796688880. The cubic root of 65131028 is about 402.3425625537.

The spelling of 65131028 in words is "sixty-five million, one hundred thirty-one thousand, twenty-eight".