65145229 has 6 divisors (see below), whose sum is σ = 67315470. Its totient is φ = 63042840.

The previous prime is 65145221. The next prime is 65145251. The reversal of 65145229 is 92254156.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 63968004 + 1177225 = 7998^2 + 1085^2 .

It is not a de Polignac number, because 65145229 - 2³ = 65145221 is a prime.

It is a super-2 number, since 2×65145229² = 8487801722924882, 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 = 65145194 and 65145203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65145221) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 32934 + ... + 34855.

It is an arithmetic number, because the mean of its divisors is an integer number (11219245).

Almost surely, 2^65145229 is an apocalyptic number.

It is an amenable number.

65145229 is a deficient number, since it is larger than the sum of its proper divisors (2170241).

65145229 is an equidigital number, since it uses as much as digits as its factorization.

65145229 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67851 (or 67820 counting only the distinct ones).

The product of its digits is 21600, while the sum is 34.

The square root of 65145229 is about 8071.2594432344. The cubic root of 65145229 is about 402.3718023374.

The spelling of 65145229 in words is "sixty-five million, one hundred forty-five thousand, two hundred twenty-nine".