43523961 has 16 divisors (see below), whose sum is σ = 66173184. Its totient is φ = 25208064.

The previous prime is 43523957. The next prime is 43523993. The reversal of 43523961 is 16932534.

It is not a de Polignac number, because 43523961 - 2² = 43523957 is a prime.

It is a super-2 number, since 2×43523961² = 3788670362259042, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (43523261) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32161 + ... + 33486.

It is an arithmetic number, because the mean of its divisors is an integer number (4135824).

Almost surely, 2^43523961 is an apocalyptic number.

It is an amenable number.

43523961 is a deficient number, since it is larger than the sum of its proper divisors (22649223).

43523961 is a wasteful number, since it uses less digits than its factorization.

43523961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65680.

The product of its digits is 19440, while the sum is 33.

The square root of 43523961 is about 6597.2692077859. The cubic root of 43523961 is about 351.7570449209.

The spelling of 43523961 in words is "forty-three million, five hundred twenty-three thousand, nine hundred sixty-one".