54921663 has 6 divisors (see below), whose sum is σ = 79331304. Its totient is φ = 36614436.

The previous prime is 54921649. The next prime is 54921683. The reversal of 54921663 is 36612945.

It is a happy number.

54921663 is a `hidden beast` number, since 5 + 492 + 166 + 3 = 666.

It is not a de Polignac number, because 54921663 - 2⁶ = 54921599 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (54921613) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3051195 + ... + 3051212.

It is an arithmetic number, because the mean of its divisors is an integer number (13221884).

Almost surely, 2^54921663 is an apocalyptic number.

54921663 is a deficient number, since it is larger than the sum of its proper divisors (24409641).

54921663 is a wasteful number, since it uses less digits than its factorization.

54921663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6102413 (or 6102410 counting only the distinct ones).

The product of its digits is 38880, while the sum is 36.

The square root of 54921663 is about 7410.9151256778. The cubic root of 54921663 is about 380.1146076286.

The spelling of 54921663 in words is "fifty-four million, nine hundred twenty-one thousand, six hundred sixty-three".