40043221429 has 4 divisors (see below), whose sum is σ = 40171978080. Its totient is φ = 39914464780.

The previous prime is 40043221409. The next prime is 40043221457. The reversal of 40043221429 is 92412234004.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 40043221429 - 2⁵ = 40043221397 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 40043221429.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40043221409) 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, 64377859 + ... + 64378480.

It is an arithmetic number, because the mean of its divisors is an integer number (10042994520).

Almost surely, 2^40043221429 is an apocalyptic number.

It is an amenable number.

40043221429 is a deficient number, since it is larger than the sum of its proper divisors (128756651).

40043221429 is a wasteful number, since it uses less digits than its factorization.

40043221429 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128756650.

The product of its (nonzero) digits is 13824, while the sum is 31.

The spelling of 40043221429 in words is "forty billion, forty-three million, two hundred twenty-one thousand, four hundred twenty-nine".