65240131 has 4 divisors (see below), whose sum is σ = 71171064. Its totient is φ = 59309200.

The previous prime is 65240113. The next prime is 65240137. The reversal of 65240131 is 13104256.

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 65240131 - 2²³ = 56851523 is a prime.

It is a super-2 number, since 2×65240131² = 8512549385794322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65240137) 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, 2965450 + ... + 2965471.

It is an arithmetic number, because the mean of its divisors is an integer number (17792766).

Almost surely, 2^65240131 is an apocalyptic number.

65240131 is a deficient number, since it is larger than the sum of its proper divisors (5930933).

65240131 is a wasteful number, since it uses less digits than its factorization.

65240131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5930932.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 65240131 is about 8077.1363118373. The cubic root of 65240131 is about 402.5670960507.

Adding to 65240131 its reverse (13104256), we get a palindrome (78344387).

The spelling of 65240131 in words is "sixty-five million, two hundred forty thousand, one hundred thirty-one".