65143444 has 6 divisors (see below), whose sum is σ = 114001034. Its totient is φ = 32571720.

The previous prime is 65143427. The next prime is 65143451. The reversal of 65143444 is 44434156.

It can be written as a sum of positive squares in only one way, i.e., 63011844 + 2131600 = 7938^2 + 1460^2 .

It is a super-2 number, since 2×65143444² = 8487336592362272, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8142927 + ... + 8142934.

Almost surely, 2^65143444 is an apocalyptic number.

It is an amenable number.

65143444 is a deficient number, since it is larger than the sum of its proper divisors (48857590).

65143444 is a wasteful number, since it uses less digits than its factorization.

65143444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16285865 (or 16285863 counting only the distinct ones).

The product of its digits is 23040, while the sum is 31.

The square root of 65143444 is about 8071.1488649386. The cubic root of 65143444 is about 402.3681272654.

The spelling of 65143444 in words is "sixty-five million, one hundred forty-three thousand, four hundred forty-four".