55520154 has 48 divisors (see below), whose sum is σ = 126584640. Its totient is φ = 18234720.

The previous prime is 55520149. The next prime is 55520159. The reversal of 55520154 is 45102555.

It is an interprime number because it is at equal distance from previous prime (55520149) and next prime (55520159).

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

It is not an unprimeable number, because it can be changed into a prime (55520159) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 33702 + ... + 35310.

It is an arithmetic number, because the mean of its divisors is an integer number (2637180).

Almost surely, 2^55520154 is an apocalyptic number.

55520154 is a gapful number since it is divisible by the number (54) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 55520154, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (63292320).

55520154 is an abundant number, since it is smaller than the sum of its proper divisors (71064486).

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

55520154 is a wasteful number, since it uses less digits than its factorization.

55520154 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1697 (or 1685 counting only the distinct ones).

The product of its (nonzero) digits is 5000, while the sum is 27.

The square root of 55520154 is about 7451.1847380131. The cubic root of 55520154 is about 381.4903476330.

The spelling of 55520154 in words is "fifty-five million, five hundred twenty thousand, one hundred fifty-four".