54161920 has 40 divisors (see below), whose sum is σ = 129867804. Its totient is φ = 21663744.

The previous prime is 54161911. The next prime is 54161923. The reversal of 54161920 is 2916145.

It can be written as a sum of positive squares in 2 ways, for example, as 46676224 + 7485696 = 6832^2 + 2736^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (54161923) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8019 + ... + 13138.

Almost surely, 2^54161920 is an apocalyptic number.

It is an amenable number.

54161920 is an abundant number, since it is smaller than the sum of its proper divisors (75705884).

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

54161920 is an equidigital number, since it uses as much as digits as its factorization.

54161920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21180 (or 21164 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 54161920 is about 7359.4782423756. The cubic root of 54161920 is about 378.3537276531.

The spelling of 54161920 in words is "fifty-four million, one hundred sixty-one thousand, nine hundred twenty".