23215040440 has 16 divisors (see below), whose sum is σ = 52233841080. Its totient is φ = 9286016160.

The previous prime is 23215040437. The next prime is 23215040479. The reversal of 23215040440 is 4404051232.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 290187966 + ... + 290188045.

Almost surely, 2^23215040440 is an apocalyptic number.

23215040440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23215040440 is an abundant number, since it is smaller than the sum of its proper divisors (29018800640).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

23215040440 is a wasteful number, since it uses less digits than its factorization.

23215040440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 580376022 (or 580376018 counting only the distinct ones).

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

Adding to 23215040440 its reverse (4404051232), we get a palindrome (27619091672).

The spelling of 23215040440 in words is "twenty-three billion, two hundred fifteen million, forty thousand, four hundred forty".