65525431 has 2 divisors, whose sum is σ = 65525432. Its totient is φ = 65525430.

The previous prime is 65525401. The next prime is 65525443. The reversal of 65525431 is 13452556.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 65525431 - 2⁵ = 65525399 is a prime.

It is a super-2 number, since 2×65525431² = 8587164215471522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 65525393 and 65525402.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65525401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32762715 + 32762716.

It is an arithmetic number, because the mean of its divisors is an integer number (32762716).

Almost surely, 2^65525431 is an apocalyptic number.

65525431 is a deficient number, since it is larger than the sum of its proper divisors (1).

65525431 is an equidigital number, since it uses as much as digits as its factorization.

65525431 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18000, while the sum is 31.

The square root of 65525431 is about 8094.7780080741. The cubic root of 65525431 is about 403.1530614522.

Adding to 65525431 its reverse (13452556), we get a palindrome (78977987).

It can be divided in two parts, 65525 and 431, that added together give a palindrome (65956).

The spelling of 65525431 in words is "sixty-five million, five hundred twenty-five thousand, four hundred thirty-one".