65550131 has 4 divisors (see below), whose sum is σ = 66448152. Its totient is φ = 64652112.

The previous prime is 65550119. The next prime is 65550139. The reversal of 65550131 is 13105556.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 65550131 - 2¹⁸ = 65287987 is a prime.

It is a super-2 number, since 2×65550131² = 8593639348234322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 65550131.

It is not an unprimeable number, because it can be changed into a prime (65550139) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 448901 + ... + 449046.

It is an arithmetic number, because the mean of its divisors is an integer number (16612038).

Almost surely, 2^65550131 is an apocalyptic number.

65550131 is a deficient number, since it is larger than the sum of its proper divisors (898021).

65550131 is an equidigital number, since it uses as much as digits as its factorization.

65550131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 898020.

The product of its (nonzero) digits is 2250, while the sum is 26.

The square root of 65550131 is about 8096.3035392703. The cubic root of 65550131 is about 403.2037116579.

Adding to 65550131 its reverse (13105556), we get a palindrome (78655687).

The spelling of 65550131 in words is "sixty-five million, five hundred fifty thousand, one hundred thirty-one".