43521010 has 16 divisors (see below), whose sum is σ = 84364056. Its totient is φ = 16069248.

The previous prime is 43520959. The next prime is 43521011. The reversal of 43521010 is 1012534.

It can be written as a sum of positive squares in 4 ways, for example, as 14220441 + 29300569 = 3771^2 + 5413^2 .

It is a super-2 number, since 2×43521010² = 3788156622840200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (43521011) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 167259 + ... + 167518.

Almost surely, 2^43521010 is an apocalyptic number.

43521010 is a deficient number, since it is larger than the sum of its proper divisors (40843046).

43521010 is a wasteful number, since it uses less digits than its factorization.

43521010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 334797.

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 43521010 is about 6597.0455508508. The cubic root of 43521010 is about 351.7490948288.

Adding to 43521010 its reverse (1012534), we get a palindrome (44533544).

The spelling of 43521010 in words is "forty-three million, five hundred twenty-one thousand, ten".