54133521 has 16 divisors (see below), whose sum is σ = 78894144. Its totient is φ = 32814144.

The previous prime is 54133493. The next prime is 54133537. The reversal of 54133521 is 12533145.

It is not a de Polignac number, because 54133521 - 2⁷ = 54133393 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 54133491 and 54133500.

It is not an unprimeable number, because it can be changed into a prime (54133561) 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, 7746 + ... + 12971.

It is an arithmetic number, because the mean of its divisors is an integer number (4930884).

Almost surely, 2^54133521 is an apocalyptic number.

It is an amenable number.

54133521 is a deficient number, since it is larger than the sum of its proper divisors (24760623).

54133521 is a wasteful number, since it uses less digits than its factorization.

54133521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20800.

The product of its digits is 1800, while the sum is 24.

The square root of 54133521 is about 7357.5485727245. The cubic root of 54133521 is about 378.2875880356.

Adding to 54133521 its reverse (12533145), we get a palindrome (66666666).

The spelling of 54133521 in words is "fifty-four million, one hundred thirty-three thousand, five hundred twenty-one".