43000040651 has 4 divisors (see below), whose sum is σ = 43008348600. Its totient is φ = 42991732704.

The previous prime is 43000040641. The next prime is 43000040693. The reversal of 43000040651 is 15604000034.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 43000040651 - 2²² = 42995846347 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (43000040641) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4146206 + ... + 4156563.

It is an arithmetic number, because the mean of its divisors is an integer number (10752087150).

Almost surely, 2^43000040651 is an apocalyptic number.

43000040651 is a deficient number, since it is larger than the sum of its proper divisors (8307949).

43000040651 is an equidigital number, since it uses as much as digits as its factorization.

43000040651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8307948.

The product of its (nonzero) digits is 1440, while the sum is 23.

Adding to 43000040651 its reverse (15604000034), we get a palindrome (58604040685).

The spelling of 43000040651 in words is "forty-three billion, forty thousand, six hundred fifty-one".