921240056 has 32 divisors (see below), whose sum is σ = 1915256880. Its totient is φ = 411878400.

The previous prime is 921240043. The next prime is 921240059. The reversal of 921240056 is 650042129.

It is a happy number.

921240056 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (921240059) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 80441 + ... + 91176.

Almost surely, 2^921240056 is an apocalyptic number.

It is an amenable number.

921240056 is an abundant number, since it is smaller than the sum of its proper divisors (994016824).

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

921240056 is a wasteful number, since it uses less digits than its factorization.

921240056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171695 (or 171691 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 921240056 is about 30351.9366103713. The cubic root of 921240056 is about 973.0256099635.

The spelling of 921240056 in words is "nine hundred twenty-one million, two hundred forty thousand, fifty-six".