54921985 has 16 divisors (see below), whose sum is σ = 70675200. Its totient is φ = 40824576.

The previous prime is 54921983. The next prime is 54922003. The reversal of 54921985 is 58912945.

It is a cyclic number.

It is not a de Polignac number, because 54921985 - 2¹ = 54921983 is a prime.

It is not an unprimeable number, because it can be changed into a prime (54921983) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2626 + ... + 10804.

It is an arithmetic number, because the mean of its divisors is an integer number (4417200).

Almost surely, 2^54921985 is an apocalyptic number.

It is an amenable number.

54921985 is a deficient number, since it is larger than the sum of its proper divisors (15753215).

54921985 is a wasteful number, since it uses less digits than its factorization.

54921985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8280.

The product of its digits is 129600, while the sum is 43.

The square root of 54921985 is about 7410.9368503584. The cubic root of 54921985 is about 380.1153504846.

The spelling of 54921985 in words is "fifty-four million, nine hundred twenty-one thousand, nine hundred eighty-five".