65552431 has 4 divisors (see below), whose sum is σ = 74917072. Its totient is φ = 56187792.

The previous prime is 65552423. The next prime is 65552437. The reversal of 65552431 is 13425556.

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 65552431 - 2³ = 65552423 is a prime.

It is a super-2 number, since 2×65552431² = 8594242420019522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 65552393 and 65552402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65552437) 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, 4682310 + ... + 4682323.

It is an arithmetic number, because the mean of its divisors is an integer number (18729268).

Almost surely, 2^65552431 is an apocalyptic number.

65552431 is a deficient number, since it is larger than the sum of its proper divisors (9364641).

65552431 is an equidigital number, since it uses as much as digits as its factorization.

65552431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9364640.

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

The square root of 65552431 is about 8096.4455781534. The cubic root of 65552431 is about 403.2084274262.

Adding to 65552431 its reverse (13425556), we get a palindrome (78977987).

The spelling of 65552431 in words is "sixty-five million, five hundred fifty-two thousand, four hundred thirty-one".