65155481 has 4 divisors (see below), whose sum is σ = 67988352. Its totient is φ = 62322612.

The previous prime is 65155477. The next prime is 65155499. The reversal of 65155481 is 18455156.

It is a happy number.

65155481 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 65155481 - 2² = 65155477 is a prime.

It is a super-2 number, since 2×65155481² = 8490473408682722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65151481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1416401 + ... + 1416446.

It is an arithmetic number, because the mean of its divisors is an integer number (16997088).

Almost surely, 2^65155481 is an apocalyptic number.

It is an amenable number.

65155481 is a deficient number, since it is larger than the sum of its proper divisors (2832871).

65155481 is a wasteful number, since it uses less digits than its factorization.

65155481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2832870.

The product of its digits is 24000, while the sum is 35.

The square root of 65155481 is about 8071.8945112037. The cubic root of 65155481 is about 402.3929085100.

The spelling of 65155481 in words is "sixty-five million, one hundred fifty-five thousand, four hundred eighty-one".