54021843 has 16 divisors (see below), whose sum is σ = 80935200. Its totient is φ = 35608320.

The previous prime is 54021833. The next prime is 54021853. The reversal of 54021843 is 34812045.

It is an interprime number because it is at equal distance from previous prime (54021833) and next prime (54021853).

It is not a de Polignac number, because 54021843 - 2⁵ = 54021811 is a prime.

It is a super-2 number, since 2×54021843² = 5836719042233298, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (54021823) 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, 8838 + ... + 13643.

It is an arithmetic number, because the mean of its divisors is an integer number (5058450).

Almost surely, 2^54021843 is an apocalyptic number.

54021843 is a deficient number, since it is larger than the sum of its proper divisors (26913357).

54021843 is a wasteful number, since it uses less digits than its factorization.

54021843 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22579 (or 22573 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

The square root of 54021843 is about 7349.9553059866. The cubic root of 54021843 is about 378.0272719049.

Adding to 54021843 its reverse (34812045), we get a palindrome (88833888).

The spelling of 54021843 in words is "fifty-four million, twenty-one thousand, eight hundred forty-three".