54021520 has 60 divisors (see below), whose sum is σ = 146116764. Its totient is φ = 18520320.

The previous prime is 54021511. The next prime is 54021553. The reversal of 54021520 is 2512045.

It can be written as a sum of positive squares in 2 ways, for example, as 25120144 + 28901376 = 5012^2 + 5376^2 .

It is a super-2 number, since 2×54021520² = 5836649246220800, which contains 22 as substring.

It is an unprimeable number.

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 in 11 ways as a sum of consecutive naturals, for example, 2971 + ... + 10810.

Almost surely, 2^54021520 is an apocalyptic number.

It is an amenable number.

54021520 is an abundant number, since it is smaller than the sum of its proper divisors (92095244).

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

54021520 is a wasteful number, since it uses less digits than its factorization.

54021520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13808 (or 13795 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 19.

The square root of 54021520 is about 7349.9333330310. The cubic root of 54021520 is about 378.0265184871.

Adding to 54021520 its reverse (2512045), we get a palindrome (56533565).

The spelling of 54021520 in words is "fifty-four million, twenty-one thousand, five hundred twenty".