64143236 has 6 divisors (see below), whose sum is σ = 112250670. Its totient is φ = 32071616.

The previous prime is 64143217. The next prime is 64143239. The reversal of 64143236 is 63234146.

It can be written as a sum of positive squares in only one way, i.e., 62504836 + 1638400 = 7906^2 + 1280^2 .

It is a super-2 number, since 2×64143236² = 8228709449103392, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 64143199 and 64143208.

It is not an unprimeable number, because it can be changed into a prime (64143239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8017901 + ... + 8017908.

It is an arithmetic number, because the mean of its divisors is an integer number (18708445).

Almost surely, 2^64143236 is an apocalyptic number.

It is an amenable number.

64143236 is a deficient number, since it is larger than the sum of its proper divisors (48107434).

64143236 is a wasteful number, since it uses less digits than its factorization.

64143236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16035813 (or 16035811 counting only the distinct ones).

The product of its digits is 10368, while the sum is 29.

The square root of 64143236 is about 8008.9472466736. The cubic root of 64143236 is about 400.2981859909.

The spelling of 64143236 in words is "sixty-four million, one hundred forty-three thousand, two hundred thirty-six".