54120213531 has 32 divisors (see below), whose sum is σ = 82669213440. Its totient is φ = 34971955200.

The previous prime is 54120213517. The next prime is 54120213583. The reversal of 54120213531 is 13531202145.

54120213531 is a `hidden beast` number, since 5 + 4 + 120 + 2 + 1 + 3 + 531 = 666.

54120213531 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 54120213531 - 2⁶ = 54120213467 is a prime.

It is a super-2 number, since 2×54120213531² (a number of 22 digits) contains 22 as substring.

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

It is a junction number, because it is equal to n+sod(n) for n = 54120213495 and 54120213504.

It is not an unprimeable number, because it can be changed into a prime (54120213431) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 25830 + ... + 330011.

It is an arithmetic number, because the mean of its divisors is an integer number (2583412920).

Almost surely, 2^54120213531 is an apocalyptic number.

54120213531 is a deficient number, since it is larger than the sum of its proper divisors (28548999909).

54120213531 is a wasteful number, since it uses less digits than its factorization.

54120213531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 356024 (or 356018 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

Adding to 54120213531 its reverse (13531202145), we get a palindrome (67651415676).

The spelling of 54120213531 in words is "fifty-four billion, one hundred twenty million, two hundred thirteen thousand, five hundred thirty-one".