40402243501 has 4 divisors (see below), whose sum is σ = 40433735232. Its totient is φ = 40370751772.

The previous prime is 40402243489. The next prime is 40402243507. The reversal of 40402243501 is 10534220404.

It is a happy number.

40402243501 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 40402243501 - 2³³ = 31812308909 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40402243507) 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, 15743941 + ... + 15746506.

It is an arithmetic number, because the mean of its divisors is an integer number (10108433808).

Almost surely, 2^40402243501 is an apocalyptic number.

It is an amenable number.

40402243501 is a deficient number, since it is larger than the sum of its proper divisors (31491731).

40402243501 is a wasteful number, since it uses less digits than its factorization.

40402243501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31491730.

The product of its (nonzero) digits is 3840, while the sum is 25.

Adding to 40402243501 its reverse (10534220404), we get a palindrome (50936463905).

The spelling of 40402243501 in words is "forty billion, four hundred two million, two hundred forty-three thousand, five hundred one".