54151220 has 48 divisors (see below), whose sum is σ = 116433408. Its totient is φ = 21150720.

The previous prime is 54151187. The next prime is 54151243. The reversal of 54151220 is 2215145.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 54151192 and 54151201.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 199685 + ... + 199955.

It is an arithmetic number, because the mean of its divisors is an integer number (2425696).

Almost surely, 2^54151220 is an apocalyptic number.

It is an amenable number.

54151220 is an abundant number, since it is smaller than the sum of its proper divisors (62282188).

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

54151220 is a wasteful number, since it uses less digits than its factorization.

54151220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 480 (or 478 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 20.

The square root of 54151220 is about 7358.7512527602. The cubic root of 54151220 is about 378.3288106911.

Adding to 54151220 its reverse (2215145), we get a palindrome (56366365).

The spelling of 54151220 in words is "fifty-four million, one hundred fifty-one thousand, two hundred twenty".