65144402 has 4 divisors (see below), whose sum is σ = 97716606. Its totient is φ = 32572200.

The previous prime is 65144399. The next prime is 65144413. The reversal of 65144402 is 20444156.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 44903401 + 20241001 = 6701^2 + 4499^2 .

It is a super-2 number, since 2×65144402² = 8487586223875208, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16286099 + ... + 16286102.

Almost surely, 2^65144402 is an apocalyptic number.

65144402 is a deficient number, since it is larger than the sum of its proper divisors (32572204).

65144402 is a wasteful number, since it uses less digits than its factorization.

65144402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32572203.

The product of its (nonzero) digits is 3840, while the sum is 26.

The square root of 65144402 is about 8071.2082119098. The cubic root of 65144402 is about 402.3700996653.

Adding to 65144402 its reverse (20444156), we get a palindrome (85588558).

The spelling of 65144402 in words is "sixty-five million, one hundred forty-four thousand, four hundred two".