54021644 has 6 divisors (see below), whose sum is σ = 94537884. Its totient is φ = 27010820.

The previous prime is 54021637. The next prime is 54021647. The reversal of 54021644 is 44612045.

It is not an unprimeable number, because it can be changed into a prime (54021647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6752702 + ... + 6752709.

It is an arithmetic number, because the mean of its divisors is an integer number (15756314).

Almost surely, 2^54021644 is an apocalyptic number.

It is an amenable number.

54021644 is a deficient number, since it is larger than the sum of its proper divisors (40516240).

54021644 is a wasteful number, since it uses less digits than its factorization.

54021644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13505415 (or 13505413 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 26.

The square root of 54021644 is about 7349.9417684768. The cubic root of 54021644 is about 378.0268077252.

Adding to 54021644 its reverse (44612045), we get a palindrome (98633689).

It can be divided in two parts, 5402 and 1644, that multiplied together give a palindrome (8880888).

The spelling of 54021644 in words is "fifty-four million, twenty-one thousand, six hundred forty-four".