43440051 has 4 divisors (see below), whose sum is σ = 57920072. Its totient is φ = 28960032.

The previous prime is 43440029. The next prime is 43440073. The reversal of 43440051 is 15004434.

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

It is an interprime number because it is at equal distance from previous prime (43440029) and next prime (43440073).

It is not a de Polignac number, because 43440051 - 2⁶ = 43439987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (43440011) 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, 7240006 + ... + 7240011.

It is an arithmetic number, because the mean of its divisors is an integer number (14480018).

Almost surely, 2^43440051 is an apocalyptic number.

43440051 is a deficient number, since it is larger than the sum of its proper divisors (14480021).

43440051 is a wasteful number, since it uses less digits than its factorization.

43440051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14480020.

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 43440051 is about 6590.9066902817. The cubic root of 43440051 is about 351.5308482754.

Adding to 43440051 its reverse (15004434), we get a palindrome (58444485).

The spelling of 43440051 in words is "forty-three million, four hundred forty thousand, fifty-one".