55154420 has 48 divisors (see below), whose sum is σ = 120702288. Its totient is φ = 21150720.

The previous prime is 55154401. The next prime is 55154441. The reversal of 55154420 is 2445155.

55154420 is digitally balanced in base 9, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 8 ways, for example, as 2910436 + 52243984 = 1706^2 + 7228^2 .

55154420 is strictly pandigital in base 9.

It is a self number, because there is not a number n which added to its sum of digits gives 55154420.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 53510 + ... + 54530.

It is an arithmetic number, because the mean of its divisors is an integer number (2514631).

Almost surely, 2^55154420 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55154420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (60351144).

55154420 is an abundant number, since it is smaller than the sum of its proper divisors (65547868).

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

55154420 is a wasteful number, since it uses less digits than its factorization.

55154420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1140 (or 1138 counting only the distinct ones).

The product of its (nonzero) digits is 4000, while the sum is 26.

The square root of 55154420 is about 7426.6021840408. The cubic root of 55154420 is about 380.6508237598.

Adding to 55154420 its reverse (2445155), we get a palindrome (57599575).

The spelling of 55154420 in words is "fifty-five million, one hundred fifty-four thousand, four hundred twenty".